character: Marine Ecosystems Overview
topic: An introduction to various marine ecosystems and their unique characteristics.
subject: Geography
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character: Coral Reefs
topic: Exploring the biodiversity and ecological importance of coral reef ecosystems.
subject: Geography
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character: Estuaries
topic: Understanding estuaries and their role as productive and biodiverse ecosystems.
subject: Geography
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character: Open Ocean
topic: Examining the vast open ocean ecosystem and its diverse marine life.
subject: Geography
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