1) Animal class 
(from the article `cnidarian`) The phylum Cnidaria is made up of four classes: Hydrozoa (hydrozoans); Scyphozoa (scyphozoans); Anthozoa (anthozoans); and Cubozoa (cubozoans). The ... ...Lack skeleton but may incorporate debris into body wall, commonly epizoic. One complete and 1 incomplete mesentery per pair. Mostly tropical.Class ... ...