character: Marine Biologist
topic: Biodiversity of Coral Reefs
subject: Geography
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character: Ecologist
topic: Impact of Coral Reefs on Marine Biodiversity
subject: Geography
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character: Conservationist
topic: Threats to Coral Reef Ecosystems
subject: Geography
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character: Oceanographer
topic: Physical Factors Affecting Coral Reef Health
subject: Geography
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