what was called coral reefs
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Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups. The polyps belong to a group of animals known as Cnidaria, which also includes sea anemones and jellyfish. ... Often called "rainforests of the sea", shallow coral reefs form some of the most diverse ecosystems on Earth.
iqra4u11gmaicom:
u had copied it from google
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a ridge of rock in the sea formed by the growth and deposit of coral.
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