What are reef producing coral called? What is the coral reef composed of? How are they created? (Site 1)

Reef producing coral is called hermatypic corals.

Coral reef is composed of hundreds to thousands of polyps which are tiny coral creatures.

Coral reefs are created when free-swimming coral larvae are attached to the hard surfaces or submerged rocks.

Explanation:

Reef producing coral is called hermatypic corals.

The coral reef is composed of hundreds to thousands of polyps which are tiny coral creatures. Each of the polyps secretes calcium carbonate.

Coral reefs are created when free-swimming coral larvae are attached to the hard surfaces or submerged rocks. These hard surfaces are basically along the edges of islands or continents.

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