![A drawing showing an ocean, and a coral reef below the surface of the water.](/sites/default/files/graphics/fema_nbs-coral-reef.png)
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Coral Reef
![A drawing showing an ocean, and a coral reef below the surface of the water.](/sites/default/files/graphics/fema_nbs-coral-reef.png)
Coral reefs serve as a natural breakwater. They absorb wave energy and protect the coast from erosion and flooding.
Coral reefs support about a quarter of the ocean’s biodiversity. They can also provide recreational opportunities and support local economies.