what are corals , explain the various types of corals?
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There are two main types of coral. Hard coral and soft coral. As the name implies hard corals build a hard calcium carbonate skeleton, and soft corals are soft and flexible lacking a hard skeleton. All corals, however, are made of animals called polyps.
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Corals are marine invertebrates within the class Anthozoa of the phylum Cnidaria. They typically form compact colonies of many identical individual polyps. Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.
Scientists generally agree on four different coral reef classifications: fringing reefs, barrier reefs, atolls, and patch reefs. Fringing reefs grow near the coastline around islands and continents. They are separated from the shore by narrow, shallow lagoons. Fringing reefs are the most common type of reef.
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