Higher classification: Animal Kingdom: Animalia Subkingdom: Eumetazoa Class:ParaHoxozoa Phylum:Cnidaria Cnidaria is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in freshwater and marine environments, predominantly the latter. Their distinguishing feature is cnidocytes,  specialized cells that they use mainly for capturing prey. Mostly marine entities...