What is a coral reef?

Coral reefs are large structures found underneath large bodies of water like the sea and the ocean. The coral reef is formed from the growth and deposit of coral held together by calcium carbonate.

Coral reefs are formed when coral larvae attach to submerge rocks. They need sunlight to grow that is why they are not common in water deeper than 45 feet.

Coral reef is also known as the "rain forest of the sea". It provides an ecosystem for many marine species which include Echinoderms, fish, worms, Mollusks, Sponges and many other Cnidarians.
The three main types of coral reefs are: fringing reef, barrier reef and atoll reef.

Coral reefs are assorted submerged biological communities held together by calcium carbonate structures emitted by corals. Coral reefs are worked by states of modest animals found in marine water that contain couple of supplements. Most coral reefs are worked from stony corals, which thus comprise of polyps that bunch in groups.

The polyps have a place with a group of animals known as Cnidaria, which additionally incorporates ocean anemones and jellyfish. Dissimilar to ocean anemones, corals emit hard carbonate exoskeletons which bolster and ensure the coral polyps. Most reefs develop best in warm, shallow, clear, sunny and fomented water.

Regularly called "rainforests of the ocean", shallow coral reefs frame the absolute most various biological systems on Earth. They possess under 0.1% of the world's sea surface, about a portion as large as the region of France, yet they give a home to no less than 25% of every marine specie, including fish, mollusks, worms, scavangers, echinoderms, wipes, tunicates and different cnidarians.