you mean by water driven tube systems in echinodermeta??? plzz tell Asked by temp_tations (student), on 3/12/11 Answers Echinoderms (Phylum Echinodermata) are a phylum of marine animals . Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone . Aside from the problematic[ vague ] Arkarua