EVERYDAY SCIENCE

Detailed explanation-1: -Corals are marine invertebrates in Phylum Coelenterata(cnidaria). It belongs to the class Anthozoa. They live in compact colonies of many identical individual polyps. The group includes the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.

Detailed explanation-2: -The class Anthozoa (under the phylum Cnidaria) includes corals, anemones, sea pens and seafans.

Detailed explanation-3: -cnidarian, also called coelenterate, any member of the phylum Cnidaria (Coelenterata), a group made up of more than 9, 000 living species. Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans.

Detailed explanation-4: -The coral animals are marine, colonial polypoid Coelenterates.

Detailed explanation-5: -Class-Anthozoa Anthozoans include corals, sea anemones, sea pens, and sea pansies. These animals are either solitary or colonial polyps that live attached to a substrate (surface). Of the 6, 000 known anthozoan species, corals comprise about 2, 500 species.