What should a habitat for echinoderms contain?

Members of the Phylum Echinodermata include many easily recognizable creatures such as sea stars (or starfish), brittle stars, sea urchins, sea cucumbers, and sea lilies. ... 4. Mutable dermis and connective tissue that, under the control of the nervous system, can fluctuate between extremely rigid and essentially fluid. read more

Echinoderms are gregarious animals and usually live in large groups. They are mostly nocturnal. They are bottom feeders and eat all sorts of food available in the sea bottoms. Most of them are carnivorous but several herbivorous forms are also known. 7. Size of Echinoderms: The sizes of Echinoderms are relatively moderate. read more