Cnidaria
Cnidarian can also be refers to as Coelenterate and belong to the phylum Cnidaria. They share several attributes and this support the theory that they had a single origin. Cnidarian distinguish feature is the presence of Cnidocyte, a specialized cell that is being used mainly for capturing prey. The Cnidarians include jellyfish, Sea whips hydras, corals, sea pens etc.