The substance secreted by corals that composes their hard skeleton.

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asked Aug 4, 2021 78.1k views

1 Answer

Moby Duck · Answer 1 · 2021-08-10T07:25:28+0000

Answer:

calcium carbonate

A coral reef is made of thin layers of calcium carbonate

Massive reef structures are formed when each individual stony coral organism—or polyp—secretes a skeleton of calcium carbonate.

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