the colourful coral reef inside aquarium |
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navigate by keyword : coral reef inside aquarium colourful isan underwater ecosystem characterized buildingcorals reefs formed colonies polyps held together calcium carbonate most built stony corals whose cluster groups |
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The colourful coral reef inside the aquarium. A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups. |
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