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Map of the world’s coral reefs

Gallery Map World Coral Reefs Hero NASA

This map shows the distribution of coral reefs around the world. Tropical coral reefs need shallow and warm water to grow. This is why tropical coral reefs only grow in the warm waters around the tropics and also in the shallower water near the coast, rather than in the open ocean.

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Zones on the reef

What factors affect zonation on the reef?

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