Though not cnidarians, members of this family known as cidaroids have been found to prey on its members from class Crinoidea.
One species from this phylum that has been shown to vary drastically in color depending on diet is Pisaster ochraceus. Though not cnidarians, members of this family known as cidaroids have been found to prey on its members from class Crinoidea. Tiedemann's bodies in these organisms produce pinocytic cells called coelomocytes, and these organisms take in food through (*) madreporites. These organisms' stone canals are an element of their water vascular system. These organisms also possess ampullae that contract to extend tube feet, and they exhibit radial symmetry. For 10 points, name this phylum whose name means "spiny-skinned," which includes sea urchins and starfish.
One species from this phylum that has been shown to vary drastically in color depending on diet is Pisaster ochraceus.
{Echinodermata}