Star Fish (SEA STARS) Family: echinoderm. Found at all depths of the ocean, the Star Fish or Sea Star is the common name for five orders and about 1500 species of the class Asteroidea of the phylum Echinodermata. Adult Star Fish range in size from 1cm to 65cm. Other classes of echinoderms include the sea urchins, sand dollars, sea cucumbers, sea lilies, and brittle stars. Star Fish live on ocean bottoms at both deep and shallow depths. Underneath each arm are hundreds of tiny suction cup feet that the Star Fish uses to propel itself. At the end of each arm is an orange eyespot. The Star Fish can’t see, but uses its eyespot to sense light and dark. The Star Fish eats in a rather unusual way. To eat its favorite food, usually a mussel or clam, the Star Fish wraps its arms around the shell and then pushes its stomach out of its body through its mouth and into the open shell. Once it digests the shell creature, it slides its stomach out of the empty shell and back inside its own body. Interesting Facts: A Star Fish is not actually a fish. It has no gills or fins. It also has no skeleton. Star Fish characteristically have five or more arms which are used for movement and to capture it's prey. Should the Star Fish lose one or more of its arms, it is capable of regenerating new ones.