character: Dr. Sylvia Earle
topic: Marine Conservation
grade: 6
subject: Geography
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character: Great Barrier Reef
topic: Coral Ecosystems
grade: 6
subject: Geography
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character: Jacques Cousteau
topic: Marine Exploration
grade: 6
subject: Geography
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character: Coral Polyps
topic: Coral Ecosystems
grade: 6
subject: Geography
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