Question

2. what is CORAL REEFS?​

Answer 1

Answer:

A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups. ... Most reefs grow best in warm, shallow, clear, sunny and agitated water.

Explanation:

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Answer 2

Answer:

A coral Reef is a underwater ecosystem characterized by Reef - building corals. Reefs are formed of colonies of coral polyps held together by calcium Carbonate....They are commonly found at shallow depths in tropical waters, but deep water and cold water coral reefs exist on smaller scales in other areas.

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