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      <Description>BIOLOGICAL PROGRAMSTHE NATIONAL AQUARIUM IN BALTIMORE, INC. (THE AQUARIUM)IS HOME TO MORE THAN 14,000 ANIMALS REPRESENTING MORE THAN 600 SPECIES, WEIGHING AS MUCH AS 500 POUNDS OR AS LITTLE AS THE WEIGHT OF A PAPER CLIP. THE AQUARIUM HOLDS AMONG ITS CORE VALUES A PASSION FOR STEWARDSHIP OF AQUATIC LIFE AND CONSERVATION AND EXCELLENCE IN STANDARDS OF ANIMAL CARE. WITH THOSE DRIVING PRINCIPLES, THE AQUARIUM SEEKS TO REPLICATE NATURAL ENVIRONMENTS, PROVIDE NOURISHING HABITATS, AND PROMOTE THE HEALTH AND ENRICHMENT NEEDS OF ITS COLLECTIONS. THE AQUARIUM'S HIGH STANDARD FOR ANIMAL CARE EXTENDS TO ANIMALS IN NATURAL SETTINGS. THE AQUARIUM'S MARINE ANIMAL RESCUE PROGRAM, FORMED IN 1991, IS A PARTNER IN A STRANDING NETWORK THAT COLLABORATES TO RESCUE AND REHABILITATE INJURED OR SICK MARINE ANIMALS. THE MARINE ANIMAL RESCUE PROGRAM HAS RESPONDED TO HUNDREDS OF STRANDINGS, INCLUDING SEALS, DOLPHINS AND ENDANGERED SEA TURTLES, AND TO SIGHTINGS OF MANATEES, DOLPHINS AND OTHER MARINE MAMMALS. IT HAS RESCUED AND RELEASED MORE THAN 88 MARINE ANIMALS. THE AQUARIUM IS ENGAGED IN ANIMAL PROTECTION WORK AROUND THE WORLD, THROUGH NUMEROUS PROGRAMS THAT CONSERVE NATURAL HABITATS, PROTECT THREATENED SPECIES AND ADDRESS ISSUES OF SUSTAINABLE POPULATIONS.</Description>
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        <Description>EDUCATION - CONSERVATION EDUCATIONCONSERVATION EDUCATION IS AT THE HEART OF THE NATIONAL AQUARIUM IN BALTIMORE, INC'S (THE AQUARIUM) MISSION OF INSPIRING POSITIVE AND RESPONSIBLE BEHAVIORS THAT PROMOTE THE HEALTH OF THE WORLD'S WATERS AND AQUATIC LIFE. THE AQUARIUM EDUCATORS ENHANCE THE SCIENCE EDUCATION OF THOUSANDS OF AREA SCHOOLCHILDREN EACH YEAR THROUGH A CONTINUUM OF SCHOOL AND YOUTH PROGRAMS THAT ARE DEVELOPED AND IMPLEMENTED TO DIRECTLY SUPPORT THE MARYLAND LEARNING OUTCOME FOR SCIENCE. THE COMMUNITY'S CHILDREN BENEFIT FROM CLASSROOM INSTRUCTION, OUTREACH VISITS TO SCHOOLS, FREE SCHOOL GROUP VISITS AND ON-SITE DEMONSTRATIONS, INTERNSHIPS, PROGRAM SCHOLARSHIPS, AND YOUTH EMPLOYMENT, AS WELL AS EXPERIENTIAL EXCURSIONS LIKE SEA TURTLE COUNTS AND WETLAND RESTORATION PROJECTS. THE MANY THOUSANDS OF STUDENTS TOUCHED BY THE AQUARIUM'S EDUCATION PROGRAMS MAKE EMOTIONAL CONNECTIONS THAT CREATE LASTING ENTHUSIASM FOR THE ENVIRONMENT. DURING THE 2009-2010 SCHOOL YEAR, NEARLY 133,000 STUDENTS AND TEACHERS FROM THE US AND TWO FOREIGN COUNTRIES VISITED THE AQUARIUM ON FIELD TRIPS. OF THOSE, SOME 72,000 STUDENTS WERE FROM MARYLAND. THESE VISITORS FROM LOCAL SCHOOLS RECEIVED ALMOST 61,000 FREE TRIPS THROUGH A GRANT FROM THE MARYLAND STATE DEPARTMENT OF EDUCATION. AS WELL, IN 2010 MORE THAN 1,200 STUDENTS AND TEACHERS AT 11 BALTIMORE CITY ELEMENTARY SCHOOLS GAINED A GREATER UNDERSTANDING AND APPRECIATION OF THE CHESAPEAKE BAY THROUGH THE INNOVATIVE AQUAPARTNERS PROGRAM.BY PARTICIPATING IN THE AQUARIUM'S EDUCATION PROGRAMS, MANY THOUSANDS OF STUDENTS EACH YEAR MAKE EMOTIONAL CONNECTIONS WITH THE NATURAL WORLD THAT CREATE LASTING ENTHUSIASM FOR THE ENVIRONMENT.CONSERVATIONTHE NATIONAL AQUARIUM IN BALTIMORE, INC. (THE AQUARIUM), IS A GLOBAL LEADER IN MARINE CONSERVATION FROM COSTA RICA TO THE CHESAPEAKE BAY, AND CONTINUES TO INCREASE PUBLIC AWARENESS OF ENVIRONMENTAL ISSUES, INSPIRE STEWARDSHIP BEHAVIORS, AND PROVIDE CITIZENS WITH THE TOOLS TO BECOME ACTIVE ENVIRONMENTAL LEADERS IN THEIR COMMUNITIES. THE AQUARIUM HAS ALSO ADOPTED GREEN PRACTICES THAT PUT THESE PRIORITIES INTO PRACTICE IN AQUARIUM BUILDINGS AND PROGRAMS. THE AQUARIUM HAS EXTENSIVE CONSERVATION EFFORTS UNDERWAY AROUND THE CHESAPEAKE BAY THAT ENGAGE COMMUNITIES TO PROTECT AND REBUILD FRAGILE TIDAL WETLANDS, VITAL TO THE EXISTENCE OF MARINE LIFE THAT MAKES THE BAY FAMOUS. IN 2010 ALONE, MORE THAN 731 VOLUNTEERS CONTRIBUTED SOME 3,800 HOURS TO RESTORE 26 ACRES OF WETLANDS, SAND DUNES, AND TREES AROUND THE BAY. THEY PLANTED NEARLY 50,000 GRASSES, TREES, AND SHRUBS (1.2 MILLION SINCE 1999), AND REMOVED 33,600 PIECES OF DEBRIS. THE AQUARIUM'S CONSERVATION EFFORTS EXTEND AROUND THE WORLD, THROUGH NUMEROUS PROGRAMS THAT CONSERVE NATURAL HABITATS, PROTECT THREATENED SPECIES, RESCUE WOUNDED AND STRANDED ANIMALS, AND ADDRESS ISSUES OF SUSTAINABLE POPULATIONS. THE AQUARIUM ALSO HOLDS ITSELF TO A HIGH CONSERVATION STANDARD. IN 2010 AQUARIUM STAFF AT THE BALTIMORE VENUE RECYCLED 460 POUNDS OF "TECHNOTRASH," 105,000 POUNDS OF PLASTIC, GLASS, ALUMINUM, CARDBOARD AND PAPER, AND 550 POUNDS OF BATTERIES, AND RE-USED OR RE-PURPOSED OFFICE SUPPLIES, AND PURCHASED ECO-FRIENDLY PRODUCTS. SOME STAFF USED THEIR PAID CONSERVATION DAY EMPLOYEE BENEFIT TO PARTICIPATE IN CLEAN-UPS, WHILE OTHERS COMMUTED BY BIKES OR BUS.</Description>
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        <Description>VISITOR OPERATIONSTHE NATIONAL AQUARIUM IN BALTIMORE, INC. (THE AQUARIUM) IS ONE OF THE MID-ATLANTIC REGION'S FOREMOST 501C(3) CONSERVATION ORGANIZATIONS AND ONE OF THE MOST VISITED AQUARIUMS IN THE UNITED STATES. THE VISITOR EXPERIENCE IS A VERY HIGH PRIORITY, BECAUSE FOR THE AVERAGE 1.4 MILLION VISITORS EACH YEAR WHO ENJOY THE AQUARIUM, IT'S THEIR FIRST STEP TOWARD MAKING A COMMITMENT TO CONSERVATION AND TO PROTECTING THE AQUATIC WORLD. THROUGH EXHIBITS, INTERACTIONS, PROGRAMS AND EVENTS, THE AQUARIUM PROVIDES TRANSFORMING EXPERIENCES THAT SPARK ACTION AND DRIVE PEOPLE TO MAKE CONSERVATION A PART OF THEIR DAILY ACTIONS. PAID STAFF AND AN INFORMED CADRE OF SOME 735 VOLUNTEERS PRESENT INTERACTIVE EDUCATION PROGRAMS AND ACTIVITIES DAILY FOR GENERAL VISITORS IN EXHIBIT GALLERIES, CLASSROOMS, THE JACOB AND HILDA BLAUSTEIN AQUATIC EDUCATION RESOURCE CENTER AND 1,300 SEAT LYN P. MEYERHOFF AMPHITHEATER. STAFF AND VOLUNTEERS INTERACT WITH VISITORS THROUGH DISCOVERY CARTS, SPECIAL PROGRAMS, HANDS-ON ACTIVITIES, AND ENTERTAINMENT IN THE AQUARIUM'S WATERFRONT PARK. THESE SUPPLEMENT THE TYPICAL ARRAY OF LIVE FEEDING DEMONSTRATIONS, FAMILY-ORIENTED SKITS, AND EDUCATIONAL DOLPHIN PRESENTATIONS. THE AQUARIUM SERVES SPECIAL NEEDS VISITORS (SIGHT, HEARING, AND PHYSICALLY-IMPAIRED VISITORS) WITH CROWD-FREE VISITS AND SPECIAL TOURS, AND PROVIDES MORE THAN 65,600 COMMUNITY MEMBERS WITH DISCOUNTED AND FREE ADMISSION WITH EVENTS SUCH AS FRIDAYS AFTER FIVE, DOLLAR DAYS, AND NIGHT FOR THE COMMUNITY AND THROUGH THE COMMUNITY TICKET DONATION PROGRAMS. IN TANDEM WITH THE ANNUAL CULTURAL HERITAGE SERIES, WHICH INCLUDES LATINO HERITAGE NIGHT AND THE BLACK HISTORY MONTH CELEBRATIONS, THESE PROGRAMS ENSURE AFFORDABLE ACCESS FOR ALL CITIZENS IN THE REGION.</Description>
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        <Description>PHYSICAL PLANTOPENED IN AUGUST 1981, THE NATIONAL AQUARIUM IN BALTIMORE, INC. (THE AQUARIUM) IS ONE OF THE MID-ATLANTIC REGION'S FOREMOST 501C(3) CONSERVATION ORGANIZATIONS AND ONE OF THE MOST VISITED AQUARIUMS IN THE UNITED STATES. THE AQUARIUM HAS AVERAGED 1.5 MILLION VISITORS ANNUALLY OVER THE LAST 10 YEARS, AND IT IS AN ECONOMIC ENGINE, GENERATING MILLIONS IN TAX DOLLARS AND TOURISM REVENUE EACH YEAR. IT EMPLOYS A DEDICATED STAFF OF PROFESSIONALS, ATTRACTS PREEMINENT MARINE BIOLOGISTS TO THE INSTITUTION, AND MAINTAINS A ROBUST CORE OF VOLUNTEERS. THE AQUARIUM DISPLAY FACILITY COMPRISES THREE BUILDINGS ON TWO PIERS, WHICH ARE CONNECTED INTERNALLY. ITS STUNNING ARCHITECTURE OF GLASS AND CONCRETE PYRAMIDS HAS MADE THE AQUARIUM AN ICONIC ELEMENT OF BALTIMORE'S SKYLINE. INSIDE, NATURALISTIC HABITATS AND EXCITING DISPLAYS INCLUDE: A SPIRALING, THREE-STORY ATLANTIC CORAL REEF; A SHARK EXHIBIT FEATURING THREE SPECIES OF SHARK AND THE ENDANGERED SAWFISH; A RAIN FOREST EXPERIENCE THAT IMMERSES VISITORS IN THE HEAT AND HUMIDITY OF THAT ECOSYSTEM; AN AMPHITHEATER WHERE VISITORS CAN OBSERVE THE GRACE, STRENGTH AND BEAUTY OF DOLPHINS; AND THE AWARD-WINNING AUSTRALIA EXHIBIT, NAMED BEST EXHIBIT OF 2008 BY THE ASSOCIATION OF ZOOS AND AQUARIUMS. A NEW JELLYFISH EXHIBIT, FOCUSED ON THEIR BEAUTY AND THE OCEAN HEALTH MESSAGES THEY CAN TEACH US, ROUNDS OUT THE EXHIBIT OFFERINGS. IN ALL, THE AQUARIUM IS HOME TO MORE THAN 14,000 ANIMALS REPRESENTING MORE THAN 600 SPECIES.</Description>
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        <Description>OUTREACH</Description>
        <BusinessCode>713990</BusinessCode>
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        <ExclusionAmount>163</ExclusionAmount>
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        <ExclusionAmount>970636</ExclusionAmount>
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      <GrantsToDomesticOrgs>
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        <ProgramServices>64900</ProgramServices>
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        <Fundraising>180000</Fundraising>
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        <ManagementAndGeneral>20414</ManagementAndGeneral>
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        <ProgramServices>6788511</ProgramServices>
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        <ManagementAndGeneral>52797</ManagementAndGeneral>
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        <Description>PROGRAM ACTIVITIES</Description>
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        <ManagementAndGeneral>30863</ManagementAndGeneral>
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      <OtherExpenses>
        <Description>SPECIMEN FOOD</Description>
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        <ProgramServices>379014</ProgramServices>
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      <OtherExpenses>
        <Description>DUES AND SUBSCRIPTIONS</Description>
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      <OtherExpenses>
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      <AllOtherExpenses>
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      <TotalLiabilities>
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      <FollowSFAS117>X</FollowSFAS117>
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        <EOY>65731124</EOY>
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      <AuditCommittee>1</AuditCommittee>
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        <CurrentTaxYear>9122650</CurrentTaxYear>
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        <CurrentTaxYearMinus1Year>1669178</CurrentTaxYearMinus1Year>
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      <InvestmentIncomePercentage>0.04670</InvestmentIncomePercentage>
      <PriorYrInvestIncomePercentage>0.04540</PriorYrInvestIncomePercentage>
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          <AddressLine2>RESTRICTED</AddressLine2>
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          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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        <AggregateContributions>RESTRICTED</AggregateContributions>
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      </TotalDirectLobbying>
      <TotalLobbyingExpenditures>
        <FilingOrganizationsTotals>185150</FilingOrganizationsTotals>
      </TotalLobbyingExpenditures>
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        <FilingOrganizationsTotals>34866075</FilingOrganizationsTotals>
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      <TotalExemptPurposeExpenditures>
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      <LobbyingNontaxableAmount>
        <FilingOrganizationsTotals>1000000</FilingOrganizationsTotals>
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      <GrassrootsNontaxableAmount>
        <FilingOrganizationsTotals>250000</FilingOrganizationsTotals>
      </GrassrootsNontaxableAmount>
      <TotLobbyingGrassrootMinusNonTx>
        <FilingOrganizationsTotals>0</FilingOrganizationsTotals>
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        <CurrentYearMinus2>1000000</CurrentYearMinus2>
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        <CurrentYear>1000000</CurrentYear>
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        <CurrentYearMinus2>172804</CurrentYearMinus2>
        <CurrentYearMinus1>155261</CurrentYearMinus1>
        <CurrentYear>185150</CurrentYear>
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        <CurrentYearMinus2>250000</CurrentYearMinus2>
        <CurrentYearMinus1>250000</CurrentYearMinus1>
        <CurrentYear>250000</CurrentYear>
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        <EndOfYearBalance>799944</EndOfYearBalance>
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        <EndOfYearBalance>799944</EndOfYearBalance>
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      <EndowmentsHeldByUnrelatedOrgs>0</EndowmentsHeldByUnrelatedOrgs>
      <EndowmentsHeldByRelatedOrgs>1</EndowmentsHeldByRelatedOrgs>
      <AreRelatedOrgsListedScheduleR>1</AreRelatedOrgsListedScheduleR>
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        <OtherCostOrOtherBasis>132970415</OtherCostOrOtherBasis>
        <Depreciation>54921471</Depreciation>
        <BookValue>78048944</BookValue>
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      <Equipment>
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        <BookValue>5680235</BookValue>
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      <OtherLandBuildings>
        <OtherCostOrOtherBasis>4202668</OtherCostOrOtherBasis>
        <BookValue>4202668</BookValue>
      </OtherLandBuildings>
      <TotalOfBookValueLandBuildings>87931847</TotalOfBookValueLandBuildings>
      <OtherLiabilities>
        <Description>DEFERRED RENT</Description>
        <Amount>1312863</Amount>
      </OtherLiabilities>
      <OtherLiabilities>
        <Description>DUE TO AFFILIATE</Description>
        <Amount>272066</Amount>
      </OtherLiabilities>
      <TotalOfAmounts>1584929</TotalOfAmounts>
      <TotalRevenue>39844724</TotalRevenue>
      <TotalExpenses>39670497</TotalExpenses>
      <ExcessOrDeficitForYear>174227</ExcessOrDeficitForYear>
      <TotalAdjustments>0</TotalAdjustments>
      <ExcessOrDeficitPerFS>174227</ExcessOrDeficitPerFS>
      <TotRevenueEtcAuditedFinclStmt>49053604</TotRevenueEtcAuditedFinclStmt>
      <DonatedSrvcAndUseOfFacilities>2460599</DonatedSrvcAndUseOfFacilities>
      <OtherRevenues>7432129</OtherRevenues>
      <RevenueNotRptdF990>9892728</RevenueNotRptdF990>
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      <OtherRevenuesNotIncluded>683848</OtherRevenuesNotIncluded>
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      <DonatedServicesUseOfFacilities>2460599</DonatedServicesUseOfFacilities>
      <OtherExpensesIncluded>2819633</OtherExpensesIncluded>
      <ExpensesNotRptdF990>5280232</ExpensesNotRptdF990>
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      <ExpensesNotRptdOnFinStmt>683848</ExpensesNotRptdOnFinStmt>
      <TotalExpensesPerForm990>39670497</TotalExpensesPerForm990>
      <Form990ScheduleDPartXIV>
        <Identifier>DESCRIPTION OF INTENDED USE OF ENDOWMENT FUNDS:</Identifier>
        <ReturnReference>PART V, LINE 4:</ReturnReference>
        <Explanation>THE ENDOWMENT FUNDS ARE HELD BY THE NATIONAL AQUARIUM IN BALTIMORE FOUNDATION, INC., A RELATED 501(C)(3) ORGANIZATION. THE FOUNDATION'S OBJECTIVE IS TO EARN A RESPECTABLE LONG-TERM, RISK ADJUSTED TOTAL RATE OF RETURN TO SUPPORT THE DESIGNATED PROGRAMS. THE FOUNDATION RECOGNIZES AND ACCEPTS THAT PURSUING A RESPECTABLE RATE OF RETURN INVOLVES RISK AND POTENTIAL VOLATILITY. THE GENERATION OF CURRENT INCOME WILL BE A SECONDARY CONSIDERATION.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>DESCRIPTION OF UNCERTAIN TAX POSITIONS UNDER FIN 48:</Identifier>
        <ReturnReference>PART X:</ReturnReference>
        <Explanation>THE AQUARIUM HAS ADOPTED THE ACCOUNTING STANDARD ON ACCOUNTING FOR UNCERTAINTY IN INCOME TAXES, WHICH ADDRESSES THE DETERMINATION OF WHETHER TAX BENEFITS CLAIMED OR EXPECTED TO BE CLAIMED ON A TAX RETURN SHOULD BE RECORDED IN THE CONSOLIDATED FINANCIAL STATEMENTS. UNDER THIS POLICY, THE AQUARIUM MAY RECOGNIZE THE TAX BENEFIT FROM AN UNCERTAIN TAX POSITION ONLY IF IT IS MORE-LIKELY-THAN-NOT THAT THE TAX POSITION WOULD BE SUSTAINED ON EXAMINATION BY TAXING AUTHORITIES, BASED ON THE TECHNICAL MERITS OF THE POSITION. MANAGEMENT HAS EVALUATED THE AQUARIUM'S TAX POSITIONS AND HAS CONCLUDED THAT THE AQUARIUM HAS TAKEN NO UNCERTAIN TAX POSITIONS THAT REQUIRE ADJUSTMENT TO THE FINANCIAL STATEMENTS TO COMPLY WITH PROVISIONS OF THIS GUIDANCE.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>PART XII, LINE 2D - OTHER ADJUSTMENTS:</Identifier>
        <Explanation>INCOME OF THE NATIONAL AQUARIUM IN BALTIMORE FOUNDATION, INC. 3,216,028. INCOME OF THE CENTER FOR AQUATIC LIFE AND CONSERVATION, INC. 1,166,145. INCOME OF THE NATIONAL AQUARIUM CONSERVATION CENTER 854,332. INCOME OF THE NATIONAL AQUARIUM SOCIETY 2,195,624.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>PART XII, LINE 4B - OTHER ADJUSTMENTS:</Identifier>
        <Explanation>INCOME ELIMINATED ON THE CONSOLIDATED FINANCIAL STATEMENTS 683,848.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>PART XIII, LINE 2D - OTHER ADJUSTMENTS:</Identifier>
        <Explanation>EXPENSES OF THE NATIONAL AQUARIUM IN BALTIMORE FOUNDATION, INC. 148,282. EXPENSES OF THE CENTER FOR AQUATIC LIFE AND CONSERVATION, INC. 505,518. EXPENSES OF THE NATIONAL AQUARIUM CONSERVATION CENTER 661,292. EXPENSES OF THE NATIONAL AQUARIUM SOCIETY 1,504,541.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>PART XIII, LINE 4B - OTHER ADJUSTMENTS:</Identifier>
        <Explanation>EXPENSES ELIMINATED ON THE CONSOLIDATED FINANCIAL STATEMENTS 683,848.</Explanation>
      </Form990ScheduleDPartXIV>
    </IRS990ScheduleD>
    <IRS990ScheduleG documentId="RetDoc1041200001">
      <MailSolicitations>X</MailSolicitations>
      <EmailSolicitations>X</EmailSolicitations>
      <PhoneSolicitations>X</PhoneSolicitations>
      <InPersonSolicitations>X</InPersonSolicitations>
      <SolicitationOfNonGovtGrants>X</SolicitationOfNonGovtGrants>
      <SolicitationOfGovtGrants>X</SolicitationOfGovtGrants>
      <AgreementRefFundraising>1</AgreementRefFundraising>
      <FundraiserActivityInformation>
        <NameOfOrganization>
          <BusinessNameLine1>HAZEN INC</BusinessNameLine1>
        </NameOfOrganization>
        <AddressUS>
          <AddressLine1>906 PENNSYLVANIA AVE STE 200SE</AddressLine1>
          <City>WASHINGTON</City>
          <State>DC</State>
          <ZIPCode>20003</ZIPCode>
        </AddressUS>
        <Activity>FUNDRAISING</Activity>
        <FundraiserControlOfFunds>0</FundraiserControlOfFunds>
        <GrossReceipts>0</GrossReceipts>
        <AmountRetainedByContractor>180000</AmountRetainedByContractor>
        <NetToOrganization>180000</NetToOrganization>
      </FundraiserActivityInformation>
      <TotalRetainedByContractors>180000</TotalRetainedByContractors>
      <TotalNetToOrganization>180000</TotalNetToOrganization>
      <LicensedStates>AL</LicensedStates>
      <LicensedStates>AK</LicensedStates>
      <LicensedStates>AZ</LicensedStates>
      <LicensedStates>AR</LicensedStates>
      <LicensedStates>CA</LicensedStates>
      <LicensedStates>CO</LicensedStates>
      <LicensedStates>CT</LicensedStates>
      <LicensedStates>DC</LicensedStates>
      <LicensedStates>FL</LicensedStates>
      <LicensedStates>GA</LicensedStates>
      <LicensedStates>IL</LicensedStates>
      <LicensedStates>KS</LicensedStates>
      <LicensedStates>KY</LicensedStates>
      <LicensedStates>MD</LicensedStates>
      <LicensedStates>ME</LicensedStates>
      <LicensedStates>MA</LicensedStates>
      <LicensedStates>MI</LicensedStates>
      <LicensedStates>MN</LicensedStates>
      <LicensedStates>MS</LicensedStates>
      <LicensedStates>NH</LicensedStates>
      <LicensedStates>NJ</LicensedStates>
      <LicensedStates>NM</LicensedStates>
      <LicensedStates>NY</LicensedStates>
      <LicensedStates>NC</LicensedStates>
      <LicensedStates>ND</LicensedStates>
      <LicensedStates>OH</LicensedStates>
      <LicensedStates>OK</LicensedStates>
      <LicensedStates>OR</LicensedStates>
      <LicensedStates>PA</LicensedStates>
      <LicensedStates>RI</LicensedStates>
      <LicensedStates>SC</LicensedStates>
      <LicensedStates>TN</LicensedStates>
      <LicensedStates>UT</LicensedStates>
      <LicensedStates>VA</LicensedStates>
      <LicensedStates>WA</LicensedStates>
      <LicensedStates>WV</LicensedStates>
      <LicensedStates>WI</LicensedStates>
    </IRS990ScheduleG>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <RecordsMaintained>1</RecordsMaintained>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>NATIONAL AQUARIUM CONSERVATION CENTER INC</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>PIER 3 501 EAST PRATT STREET</AddressLine1>
          <City>BALTIMORE</City>
          <State>MD</State>
          <ZIPCode>21202</ZIPCode>
        </AddressUS>
        <EINOfRecipient>271428324</EINOfRecipient>
        <IRCSection>501(C)(3)</IRCSection>
        <AmountOfCashGrant>118365</AmountOfCashGrant>
        <PurposeOfGrant>GENERAL SUPPORT</PurposeOfGrant>
      </RecipientTable>
      <TotalNbrOf501C3AndGovtGrants>1</TotalNbrOf501C3AndGovtGrants>
      <TotalNbrOfOtherOrganizations>0</TotalNbrOfOtherOrganizations>
      <Form990ScheduleIPartIV>
        <Identifier>PROCEDURE FOR MONITORING GRANTS IN THE U.S.:</Identifier>
        <ReturnReference>PART I, LINE 2:</ReturnReference>
        <Explanation>SCHEDULE I, PART I, LINE 2: THE GRANT IS TO A RELATED ORGANIZATION. THE BOARD OF DIRECTORS AUTHORIZES THE GRANT AND THE CONTROLLER MONITORS IT'S USAGE MONTHLY.</Explanation>
      </Form990ScheduleIPartIV>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <CompensationCommittee>X</CompensationCommittee>
      <Form990OfOtherOrganizations>X</Form990OfOtherOrganizations>
      <CompensationSurvey>X</CompensationSurvey>
      <BoardOrCommitteeApproval>X</BoardOrCommitteeApproval>
      <SeverancePayment>1</SeverancePayment>
      <SupplementalNonqualRetirePlan>0</SupplementalNonqualRetirePlan>
      <EquityBasedCompArrangement>0</EquityBasedCompArrangement>
      <CompBasedOnRevenueOfFilingOrg>0</CompBasedOnRevenueOfFilingOrg>
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      <CompBasedNetEarningsRelateOrgs>0</CompBasedNetEarningsRelateOrgs>
      <AnyNonFixedPayments>1</AnyNonFixedPayments>
      <InitialContractException>0</InitialContractException>
      <Form990ScheduleJPartII>
        <NamePerson>DAVID PITTENGER</NamePerson>
        <BaseCompensationFilingOrg>268987</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>0</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
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        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
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        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>PAULA SCHAEDLICH</NamePerson>
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        <BonusFilingOrg>0</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>2701</DeferredCompFilingOrg>
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        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>BRUCE S HOFFBERGER</NamePerson>
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        <DeferredCompFilingOrg>2702</DeferredCompFilingOrg>
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        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>DENISE ARONOFF BROWN</NamePerson>
        <BaseCompensationFilingOrg>124712</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>0</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>75000</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>1990</DeferredCompFilingOrg>
        <DeferredCompRelatedOrgs>0</DeferredCompRelatedOrgs>
        <NontaxableBenefitsFilingOrg>16877</NontaxableBenefitsFilingOrg>
        <NontaxableBenefitsRelatedOrgs>0</NontaxableBenefitsRelatedOrgs>
        <TotalCompensationFilingOrg>218579</TotalCompensationFilingOrg>
        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>KATHLEEN SHER</NamePerson>
        <BaseCompensationFilingOrg>159139</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>25000</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>1500</DeferredCompFilingOrg>
        <DeferredCompRelatedOrgs>0</DeferredCompRelatedOrgs>
        <NontaxableBenefitsFilingOrg>8550</NontaxableBenefitsFilingOrg>
        <NontaxableBenefitsRelatedOrgs>0</NontaxableBenefitsRelatedOrgs>
        <TotalCompensationFilingOrg>194189</TotalCompensationFilingOrg>
        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>JOHN GOODENOW</NamePerson>
        <BaseCompensationFilingOrg>178720</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>0</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>2700</DeferredCompFilingOrg>
        <DeferredCompRelatedOrgs>0</DeferredCompRelatedOrgs>
        <NontaxableBenefitsFilingOrg>14323</NontaxableBenefitsFilingOrg>
        <NontaxableBenefitsRelatedOrgs>0</NontaxableBenefitsRelatedOrgs>
        <TotalCompensationFilingOrg>195743</TotalCompensationFilingOrg>
        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>ROBERT RAMIN</NamePerson>
        <BaseCompensationFilingOrg>39227</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>117681</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>0</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>602</DeferredCompFilingOrg>
        <DeferredCompRelatedOrgs>1805</DeferredCompRelatedOrgs>
        <NontaxableBenefitsFilingOrg>4512</NontaxableBenefitsFilingOrg>
        <NontaxableBenefitsRelatedOrgs>13535</NontaxableBenefitsRelatedOrgs>
        <TotalCompensationFilingOrg>44341</TotalCompensationFilingOrg>
        <TotalCompensationRelatedOrgs>133021</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartII>
        <NamePerson>BRENT WHITAKER</NamePerson>
        <BaseCompensationFilingOrg>134817</BaseCompensationFilingOrg>
        <CompBasedOnRelatedOrgs>0</CompBasedOnRelatedOrgs>
        <BonusFilingOrg>0</BonusFilingOrg>
        <BonusRelatedOrgs>0</BonusRelatedOrgs>
        <OtherCompensationFilingOrg>0</OtherCompensationFilingOrg>
        <OtherCompensationRelatedOrgs>0</OtherCompensationRelatedOrgs>
        <DeferredCompFilingOrg>2120</DeferredCompFilingOrg>
        <DeferredCompRelatedOrgs>0</DeferredCompRelatedOrgs>
        <NontaxableBenefitsFilingOrg>20127</NontaxableBenefitsFilingOrg>
        <NontaxableBenefitsRelatedOrgs>0</NontaxableBenefitsRelatedOrgs>
        <TotalCompensationFilingOrg>157064</TotalCompensationFilingOrg>
        <TotalCompensationRelatedOrgs>0</TotalCompensationRelatedOrgs>
        <CompReportPrior990FilingOrg>0</CompReportPrior990FilingOrg>
        <CompReportPrior990RelatedOrgs>0</CompReportPrior990RelatedOrgs>
      </Form990ScheduleJPartII>
      <Form990ScheduleJPartIII>
        <ReturnReference>PART I, LINE 4A</ReturnReference>
        <Explanation>DENISE ARANOFF BROWN CEASED EMPLOYMENT WITH THE NATIONAL AQUARIUM IN BALTIMORE, INC. BOTH SHE AND THE AQUARIUM ENTERED INTO A SEPARATION AGREEMENT THAT, DUE TO A CONFIDENTIALITY CLAUSE, THE TERMS AND CONDITIONS OF WHICH ARE AVAILABLE TO THE IRS UPON REQUEST. ALL PAYMENTS MADE IN THE CURRENT PERIOD ARE SET FORTH AS OTHER REPORTABLE COMPENSATION IN PART II, SCHEDULE J.</Explanation>
      </Form990ScheduleJPartIII>
      <Form990ScheduleJPartIII>
        <ReturnReference>PART I, LINE 7</ReturnReference>
        <Explanation>THE ANNUAL BONUS IS DETERMINED IN PART BASED ON INDIVIDUAL PERFORMANCE AND WHETHER OR NOT THE AQUARIUM MEETS CERTAIN OPERATIONAL BENCHMARKS AS OF THE END OF THE YEAR. BONUSES REFLECTED ARE BASED ON THE IMMEDIATELY PRECEDING CALENDAR YEAR RESULTS. KATHLEEN SHER'S BONUS, INCLUDED IN PART II, IS RELATED TO A VACANCY IN THE SENIOR MARKETING DIRECTOR POSITION. NO OTHER BONUSES WERE ACCRUED OR PAID IN 2010.</Explanation>
      </Form990ScheduleJPartIII>
    </IRS990ScheduleJ>
    <IRS990ScheduleK documentId="RetDoc1053100001">
      <Form990ScheduleKPartI>
        <IssuerName>
          <BusinessNameLine1>MARYLAND INDUSTRIAL DEVELPMENT FINANCING AUTHORITY</BusinessNameLine1>
        </IssuerName>
        <IssuerEIN>526002033</IssuerEIN>
        <CUSIPNumber>574221CL5</CUSIPNumber>
        <DateIssued>2002-06-01</DateIssued>
        <IssuePrice>20087198</IssuePrice>
        <DescriptionOfPurpose>ADDITIONS TO AQUARIUM</DescriptionOfPurpose>
        <Defeased>0</Defeased>
        <OnBehalfOfIssuer>0</OnBehalfOfIssuer>
        <PoolFinancing>0</PoolFinancing>
      </Form990ScheduleKPartI>
      <Form990ScheduleKPartI>
        <IssuerName>
          <BusinessNameLine1>MARYLAND INDUSTRIAL DEVELPMENT FINANCING AUTHORITY</BusinessNameLine1>
        </IssuerName>
        <IssuerEIN>526002033</IssuerEIN>
        <CUSIPNumber>574223CL5</CUSIPNumber>
        <DateIssued>2009-10-07</DateIssued>
        <IssuePrice>12490000</IssuePrice>
        <DescriptionOfPurpose>REFUND OF PRIOR ISSUES</DescriptionOfPurpose>
        <Defeased>0</Defeased>
        <OnBehalfOfIssuer>0</OnBehalfOfIssuer>
        <PoolFinancing>0</PoolFinancing>
      </Form990ScheduleKPartI>
      <Form990ScheduleKPartII>
        <AmountRetired>3150000</AmountRetired>
        <TotalProceeds>20087198</TotalProceeds>
        <AmountInReserveFund>1574235</AmountInReserveFund>
        <IssuanceCostsFromProceeds>316918</IssuanceCostsFromProceeds>
        <CapitalExpenditures>18196045</CapitalExpenditures>
        <YearOfSubstCompletion>2005</YearOfSubstCompletion>
        <CurrentRefunding>0</CurrentRefunding>
        <AdvanceRefunding>0</AdvanceRefunding>
        <FinalAllocationMade>1</FinalAllocationMade>
        <AdequateBooksAndRecdsMaintaind>1</AdequateBooksAndRecdsMaintaind>
      </Form990ScheduleKPartII>
      <Form990ScheduleKPartII>
        <AmountRetired>705000</AmountRetired>
        <TotalProceeds>12490000</TotalProceeds>
        <YearOfSubstCompletion>2005</YearOfSubstCompletion>
        <CurrentRefunding>1</CurrentRefunding>
        <AdvanceRefunding>0</AdvanceRefunding>
        <FinalAllocationMade>1</FinalAllocationMade>
        <AdequateBooksAndRecdsMaintaind>1</AdequateBooksAndRecdsMaintaind>
      </Form990ScheduleKPartII>
      <Form990ScheduleKPartIII>
        <OwningBondFinancedProperty>0</OwningBondFinancedProperty>
        <AnyLeaseArrangements>0</AnyLeaseArrangements>
        <MngmentCntrctBondFinancdPrprty>0</MngmentCntrctBondFinancdPrprty>
        <AnyResearchAgreements>0</AnyResearchAgreements>
        <BondCounselRoutinelyEngaged>1</BondCounselRoutinelyEngaged>
        <PercentageOfPrvtBusinessReUBI>0.01600</PercentageOfPrvtBusinessReUBI>
        <TotalPrivateBusinessUse>0.01600</TotalPrivateBusinessUse>
        <PostIssuanceComplianceProcdrs>1</PostIssuanceComplianceProcdrs>
      </Form990ScheduleKPartIII>
      <Form990ScheduleKPartIV>
        <Form8038TFiled>0</Form8038TFiled>
        <VariableRateIssue>0</VariableRateIssue>
        <HedgeIdentifiedInBooksAndRecds>0</HedgeIdentifiedInBooksAndRecds>
        <GrossProceedsInvestedInGIC>0</GrossProceedsInvestedInGIC>
        <GrossProceedsInvested>0</GrossProceedsInvested>
        <ExceptionToRebate>1</ExceptionToRebate>
      </Form990ScheduleKPartIV>
      <Form990ScheduleKPartIV>
        <Form8038TFiled>0</Form8038TFiled>
        <VariableRateIssue>1</VariableRateIssue>
        <HedgeIdentifiedInBooksAndRecds>0</HedgeIdentifiedInBooksAndRecds>
        <GrossProceedsInvestedInGIC>0</GrossProceedsInvestedInGIC>
        <GrossProceedsInvested>0</GrossProceedsInvested>
        <ExceptionToRebate>1</ExceptionToRebate>
      </Form990ScheduleKPartIV>
    </IRS990ScheduleK>
    <IRS990ScheduleL documentId="RetDoc1042800001">
      <Form990ScheduleLPartIV>
        <NameOfInterestedPerson>
          <NamePerson>MT BANK</NamePerson>
        </NameOfInterestedPerson>
        <Relationship>MOHANNAD F. JISHI</Relationship>
        <AmountOfTransaction>419912</AmountOfTransaction>
        <DescriptionOfTransaction>BANKING SRVS - THE NATIONAL AQUARIUM IN BALTIMORE PAID M&amp;T BANK MERCHANT SERVICE AND TREASURY MANAGEMENT FEES. BOARD MEMBER MOHANNAD F. JISHI OF THE NATIONAL AQUARIUM IN BALTIMORE, INC., IN ADDITION TO THE NATIONAL AQUARIUM INSTITUTE, INC. (SEE IDENTIFICATION OF RELATED ORGANIZATIONS - SCHEDULE R), IS AN OFFICER OF M&amp;T BANK, HOWEVER THAT RELATIONSHIP HAD NO BEARING ON THE ABILITY TO OBTAIN OR TERMS ACCEPTED UNDER THE AGREEMENT. THE AQUARIUM'S PRIMARY BANKING RELATIONSHIP WITH M&amp;T BANK ENDED IN NOVEMBER 2009.</DescriptionOfTransaction>
        <SharingOfRevenues>0</SharingOfRevenues>
      </Form990ScheduleLPartIV>
      <Form990ScheduleLPartIV>
        <NameOfInterestedPerson>
          <NamePerson>VENABLE LLP</NamePerson>
        </NameOfInterestedPerson>
        <Relationship>NEAL BORDEN</Relationship>
        <AmountOfTransaction>280632</AmountOfTransaction>
        <DescriptionOfTransaction>LEGAL AND LOBBYING SRVS - NEAL BORDEN IS WITH THE LAW FIRM VENABLE, LLP AND A BOARD MEMBER OF THE NATIONAL AQUARIUM IN BALTIMORE, INC. NEAL BORDEN'S RELATIONSHIP WITH VENABLE, LLP HAD NO BEARING ON THE NATIONAL AQUARIUM IN BALTIMORE INC. UTILIZATION OF THE LAW FIRM IN THE NORMAL COURSE OF BUSINESS.</DescriptionOfTransaction>
        <SharingOfRevenues>0</SharingOfRevenues>
      </Form990ScheduleLPartIV>
      <Form990ScheduleLPartIV>
        <NameOfInterestedPerson>
          <NamePerson>CONSTELLATION ENERGY</NamePerson>
        </NameOfInterestedPerson>
        <Relationship>ANDREW GOOD</Relationship>
        <AmountOfTransaction>2149970</AmountOfTransaction>
        <DescriptionOfTransaction>UTILITIES - BOARD MEMBER ANDREW GOOD IS A SR. VICE PRESIDENT FOR CORPORATE STRATEGY AND DEVELOPMENT OF CONSTELLATION ENERGY AND A BOARD MEMBER OF THE NATIONAL AQUARIUM IN BALTIMORE, INC. ANDREW GOODS RELATIONSHIP WITH CONSTELLATION ENERGY HAD NO BEARING ON THE NATIONAL AQUARIUM IN BALTIMORE INC. UTILIZATION OF THE COMPANY IN THE NORMAL COURSE OF BUSINESS.</DescriptionOfTransaction>
        <SharingOfRevenues>0</SharingOfRevenues>
      </Form990ScheduleLPartIV>
    </IRS990ScheduleL>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <GeneralExplanation>
        <Identifier>FORM 990, PART VI, SECTION B, LINE 11</Identifier>
        <Explanation>PRIOR TO THE FILING OF THE FORM 990, THE FINANCE AND AUDIT COMMITTEE WILL REVIEW THE FORM AND THEN A COPY OF THE FORM WILL BE PROVIDED ELECTRONICALLY TO ALL BOARD MEMBERS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 12C</ReturnReference>
        <Explanation>AS STATED IN THE ORGANIZATION'S CONFLICT OF INTEREST POLICY, ANNUALLY EACH BOARD MEMBER AND KEY EMPLOYEE IS REQUESTED TO COMPLETE A CONFLICT OF INTEREST DISCLOSURE AND INDICATE ANY POTENTIAL CONFLICTS. A SUMMARY OF THE DISCLOSURES IS REVIEWED BY THE FINANCE AND AUDIT COMMITTEE OF THE BOARD AND ANY AND ALL APPROPRIATE ACTIONS ARE THEN TAKEN IN ACCORDANCE WITH THE POLICY. ADDITIONALLY THE SUMMARY OF DISCLOSURES IS DISTRIBUTED TO KEY EMPLOYEES TO ENHANCE THEIR AWARENESS WHEN CONTEMPLATING AND/OR ENTERING INTO BUSINESS TRANSACTIONS.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION B, LINE 15</ReturnReference>
        <Explanation>THE COMPENSATION FOR THE EXECUTIVE DIRECTOR IS REVIEWED ANNUALLY BY THE COMPENSATION COMMITTEE OF THE BOARD, AND UPDATED AS PRUDENT BASED ON INFORMATION RECEIVED FROM INDEPENDENT COMPENSATION STUDIES AND SURVEYS, AS WELL AS INFORMATION RECEIVED BY THE COMMITTEE FROM OTHER INTERNAL AND EXTERNAL SOURCES.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>FORM 990, PART VI, SECTION C, LINE 19</ReturnReference>
        <Explanation>NATIONAL AQUARIUM IN BALTIMORE, INC. HAS ITS GOVERNING DOCUMENTS, CONFLICT OF INTEREST POLICIES, AND FINANCIAL STATEMENTS AVAILABLE TO THE PUBLIC UPON REQUEST ONLY. FINANCIAL STATEMENTS ARE ALSO INCLUDED WITH PUBLICATIONS ASSOCIATED WITH THE NATIONAL AQUARIUM INSTITUTE, INC.'S ANNUAL REPORT IN ADDITION TO BEING AVAILABLE THROUGH NOT-FOR-PROFIT INTERNET PORTALS SUCH AS GUIDESTAR AND CHARITY NAVIGATOR.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>HOURS DEVOTED TO RELATED ORGANIZATIONS:</Identifier>
        <ReturnReference>FORM 990, PART VII, SECTION A</ReturnReference>
        <Explanation>SEVERAL DIRECTORS OF NATIONAL AQUARIUM IN BALTIMORE, INC. (NAIB) ARE ALSO DIRECTORS OF NATIONAL AQUARIUM CONSERVATION CENTER, INC. (NACC), NATIONAL AQUARIUM INSTITUTE, INC. (NAI), CENTER FOR AQUATIC LIFE &amp; CONSERVATION, INC. (CALC), NATIONAL AQUARIUM IN BALTIMORE FOUNDATION, INC. (NAF),AND NATIONAL AQUARIUM SOCIETY (NAS), ALL OF WHICH ARE RELATED ORGANIZATIONS. HOURS DEVOTED TO RELATED ORGANIZATIONS ARE LISTED BELOW. THESE HOURS ARE ALL UNCOMPENSATED, VOLUNTEER HOURS. INDIVIDUAL NACC NAI CALC NAF NAS ANDREW GOOD 0 1 0 0 0 BRIAN MCHALE 0 1 0 0 0 CHARLES PHILLIPS 0 1 0 0 0 CHARLES RODGERS 0 1 0 0 0 DAMIN O'DOHERTY 0 1 0 0 0 DAVID BOWEN 0 1 0 0 0 DIANA RAMSAY 0 1 0 0 0 DONALD PETTIT 0 1 0 0 0 ELIJAH CUMMINGS 0 1 0 0 0 FRANK GUNTHER 0 1 0 0 0 JAMES DALE 0 1 0 0 0 JENNIFER REYNOLDS 0 1 0 1 0 JIM SEAY 0 1 0 0 0 JOHN MCCORMICK 0 1 0 0 0 LEE RILEY 0 1 0 0 0 MARILYN CARP 0 1 0 0 0 MARK EDWARD 0 1 0 0 0 MARK SAPPERSTEIN 0 1 0 0 0 MARTY MADDEN 0 1 0 0 0 MARY GRAUL 1 1 0 0 0 MOHANNAD JISHI 0 1 0 0 0 NEAL BORDEN 0 1 1 1 0 NINA SELIN 0 1 0 0 1 ORLAN JOHNSON 0 1 0 0 0 RANDALL GRIFFIN 1 1 1 0 1 RENEE BRONFEIN ADES 0 1 0 0 0 RHODA WASHINGTON 0 1 0 0 0 RICHARD SCHWARTZ 0 1 0 0 0 ROBERT CARTER 0 1 0 0 0 SCOTT PLANK 0 1 0 0 0 STEPHANIE RAWLINGS BLAKE 0 1 0 0 0 WAYNE CURRY 0 1 0 0 0 WILLIAM NORTON 0 1 0 0 0 WILLIAM ROBERTS 1 1 1 1 1 SEVERAL OFFICERS, KEY EMPLOYEES, OR HIGHLY COMPENSATED EMPLOYEES OF NATIONAL AQUARIUM IN BALTIMORE, INC. ARE ALSO OFFICERS, KEY EMPLOYEES, OR HIGHLY COMPENSATED EMPLOYEES OF NATIONAL AQUARIUM CONSERVATION CENTER, INC., NATIONAL AQUARIUM INSTITUTE, INC., CENTER FOR AQUATIC LIFE &amp; CONSERVATION, INC., NATIONAL AQUARIUM IN BALTIMORE FOUNDATION, INC., AND NATIONAL AQUARIUM SOCIETY, ALL OF WHICH ARE RELATED ORGANIZATIONS. ALL INDIVIDUALS ARE COMPENSATED IN FULL BY THE NAIB, AND SERVICES PERFORMED UNDER THE HOURS DEVOTED TO RELATED ORGANIZATIONS ARE PROVIDED GRATIS. THE HOURS ARE BASED ON A 40 HOUR PER WEEK STANDARD. HOURS DEVOTED TO RELATED ORGANIZATIONS ARE LISTED BELOW. INDIVIDUAL NAI NAS NAF CALC NACC DAVE PITTENGER 12 4 2 2 8 PAULA SCHAEDLICH 10 4 0 2 4 BRUCE HOFFBERGER 14 4 2 2 4 DENISE ARONOFF BROWN 0 8 0 0 0 KATHY SHER 12 2 0 0 3 JOHN GOODENOW 2 2 0 2 10 BOB RAMIN 0 30 0 0 0 BRENT WHITAKER 4 4 0 0 2 TIM PULA 0 12 0 8 0 SEAN DELANEY 0 4 0 0 1 BILL MINARIK 4 0 0 0 0 SCOTT PERICH 1 6 0 1 2</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
    <IRS990ScheduleR documentId="RetDoc1043400001">
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>NATIONAL AQUARIUM INSTITUTE INC</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>PIER 3 - 501 EAST PRATT STREET</AddressLine1>
          <City>BALTIMORE</City>
          <State>MD</State>
          <ZIPCode>21202</ZIPCode>
        </AddressUS>
        <EIN>202671673</EIN>
        <PrimaryActivities>SUPPORTING ORGANIZATION</PrimaryActivities>
        <LegalDomicileState>MD</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>LINE 11B, II</PublicCharityStatus>
        <DirectControllingEntityNA>N/A</DirectControllingEntityNA>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>NATIONAL AQUARIUM IN BALTIMORE FOUNDATION INC</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>111 MARKET PLACE</AddressLine1>
          <City>BALTIMORE</City>
          <State>MD</State>
          <ZIPCode>21202</ZIPCode>
        </AddressUS>
        <EIN>521301162</EIN>
        <PrimaryActivities>SUPPORTING ORGANIZATION</PrimaryActivities>
        <LegalDomicileState>MD</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>LINE 11B, II</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>NATIONAL AQUARIUM INSTITUTE INC</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>THE NATIONAL AQUARIUM SOCIETY</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>PIER 3 - 501 EAST PRATT STREET</AddressLine1>
          <City>BALTIMORE</City>
          <State>MD</State>
          <ZIPCode>21202</ZIPCode>
        </AddressUS>
        <EIN>521243739</EIN>
        <PrimaryActivities>MARINE WILDLIFE AND AQUATIC ANIMAL EDUCATION</PrimaryActivities>
        <LegalDomicileState>MD</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>LINE 9</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>NATIONAL AQUARIUM INSTITUTE INC</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>CENTER FOR AQUATIC LIFE AND CONSERVATION INC</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>PIER 3 - 501 EAST PRATT STREET</AddressLine1>
          <City>BALTIMORE</City>
          <State>MD</State>
          <ZIPCode>21202</ZIPCode>
        </AddressUS>
        <EIN>202158507</EIN>
        <PrimaryActivities>EDUCATION ON AQUATIC LIFE AND CONSERVATION.</PrimaryActivities>
        <LegalDomicileState>MD</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>LINE 7</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>NATIONAL AQUARIUM INSTITUTE INC</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <Form990ScheduleRPartII>
        <NameOfDisregardedEntity>
          <BusinessNameLine1>NATIONAL AQUARIUM CONSERVATION CENTER INC</BusinessNameLine1>
        </NameOfDisregardedEntity>
        <AddressUS>
          <AddressLine1>PIER 3 - 501 EAST PRATT STREET</AddressLine1>
          <City>BALTIMORE</City>
          <State>MD</State>
          <ZIPCode>21202</ZIPCode>
        </AddressUS>
        <EIN>271428324</EIN>
        <PrimaryActivities>CONSERVATION</PrimaryActivities>
        <LegalDomicileState>MD</LegalDomicileState>
        <ExemptCodeSection>501(C)(3)</ExemptCodeSection>
        <PublicCharityStatus>LINE 7</PublicCharityStatus>
        <DirectControllingEntityName>
          <BusinessNameLine1>NATIONAL AQUARIUM INSTITUTE INC</BusinessNameLine1>
        </DirectControllingEntityName>
        <ControlledOrg>0</ControlledOrg>
      </Form990ScheduleRPartII>
      <ReceiptOfIntAnnRentsRoyalties>0</ReceiptOfIntAnnRentsRoyalties>
      <GiftGrantOrCapContrToOtherOrg>1</GiftGrantOrCapContrToOtherOrg>
      <GiftGrantOrCapContrFrOtherOrg>1</GiftGrantOrCapContrFrOtherOrg>
      <LoansOrGuaranteesToOtherOrg>0</LoansOrGuaranteesToOtherOrg>
      <LoansOrGuaranteesFromOtherOrg>0</LoansOrGuaranteesFromOtherOrg>
      <SaleOfAssetsToOtherOrg>0</SaleOfAssetsToOtherOrg>
      <PurchaseOfAssetsFromOtherOrg>0</PurchaseOfAssetsFromOtherOrg>
      <ExchangeOfAssets>0</ExchangeOfAssets>
      <RentalOfFacilitiesToOtherOrgs>0</RentalOfFacilitiesToOtherOrgs>
      <RentalOfFacilitiesFrOtherOrgs>0</RentalOfFacilitiesFrOtherOrgs>
      <PerformOfServicesForOtherOrgs>0</PerformOfServicesForOtherOrgs>
      <PerformOfServicesByOtherOrgs>0</PerformOfServicesByOtherOrgs>
      <SharingOfFacilities>1</SharingOfFacilities>
      <SharingOfPaidEmployees>1</SharingOfPaidEmployees>
      <ReimbursementPaidToOtherOrg>0</ReimbursementPaidToOtherOrg>
      <ReimbursementPaidByOtherOrg>0</ReimbursementPaidByOtherOrg>
      <OtherTransferToOtherOrg>0</OtherTransferToOtherOrg>
      <OtherTransferFromOtherOrg>0</OtherTransferFromOtherOrg>
    </IRS990ScheduleR>
  </ReturnData>
</Return>