(1) Echinoderms include the sea urchins and starfish .(2) Sea urchins and starfish are the last and most obvious group of marine creatures lurking to catch unwary and clumsy humans.(3) Growth on the hull of the wreck consists largely of small shells with grazing sea urchins and starfish .(4) Thus far there are no serious signs of predation by crabs or starfish .(5) Scattered on the cloth are pinecones and seashells, a sand dollar, a starfish , a sea urchin.
