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What is coral reefs?

Sagot :

Coral reefs are diversed underwater ecosystems built from calcium carbonate secreted by corals.

Answer:

Coral reef

Coral reefs are large underwater structures composed of the skeletons of colonial marine invertebrates called coral. ... Each individual coral is referred to as a polyp. Coral polyps live on the calcium carbonate exoskeletons of their ancestors, adding their own exoskeleton to the existing coral structure.

Explanation:

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