character: Marine Biologist
topic: Types of Coastal Ecosystems
grade: 10
subject: Geography
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character: Coastal Ecologist
topic: Estuarine Ecosystems
grade: 10
subject: Geography
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character: Ecologist
topic: Coral Reef Structures
grade: 10
subject: Geography
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character: Oceanographer
topic: Tidal Zones and Their Importance
grade: 10
subject: Geography
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