Question

write a few lines on coral reefs​

Answer 1

Explanation:

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.

Answer 2

Answer:

A coral reef is a large underwater structure made of dead and living corals (press to see more). In most healthy reefs, stony corals are predominant. They are built from colonial polyps from the phylum Cnidaria which secrete an exoskeleton of calcium carbonate.

Explanation:

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