Question

what is coral reefs..?

Answer 1

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=> Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures secreted by corals.

=> Coral reefs are built by colonies of tiny animals found in marine waters that contain few nutrients.

=> Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups.

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Answer 2

HELLO!!!

$\huge\sf{\red{Answer:-}}$

⚫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. ...

⚫They are most commonly found at shallow depths in tropical waters, but deep water and cold water coral reefs exist on smaller scales in other areas.

⚫ Coral reefs are built by colonies of tiny animals found in marine waters that contain few nutrients.