Question

Write
a short note
on
Corals
Name.
2
examples of coral reefs.​

Answer 1

Answer:

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Explanation:

1]A coral reef is an underwater ecosystem characterized by reef-building corals.

2]Reefs are formed of colonies of coral polyps held together by calcium carbonate.

3]Most coral reefs are built from stony corals, whose polyps cluster in groups.

4]Coral belongs to the class Anthozoa in the animal phylum Cnidaria, which includes sea anemones and jellyfish.

4]Unlike sea anemones, corals secrete hard carbonate exoskeletons that support and protect the coral.

5]Most reefs grow best in warm, shallow, clear, sunny and agitated water.

6] Coral reefs first appeared 485 million years ago, at the dawn of the Early Ordovician, displacing the microbial and sponge reefs of the Cambrian.

7]Sometimes called rainforests of the sea, shallow coral reefs form some of Earth's most diverse ecosystems.

8]Coral reefs flourish in ocean waters that provide few nutrients.

9]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.

10] The examples of coral reefs are Great Barrier Reef and Amazon reef .

hope this helps ..!