Coral Reefs: Secret Cities of the Sea

Reefs are made of coral and very small animals.

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The oldest coral is even older than the dinosaurs.

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By comparison, humans arrived 240M years ago.

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The oldest coral can be found in Australian oceans.

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The Great Barrier Reef is home to more than 400 kinds of fish.

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Coral has been used as the basis of medicines.

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More than five trillion pounds is made from coral reefs every year.

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Globally, over 500M people rely on the reefs.

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If it weren't for the coral reefs, millions of people would die from tsunamis every year.

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40M years ago, the Coral Triangle in Asia was the most diverse area on Earth.

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