Members of this phylum possess ambulacral grooves that assist in food transport and locomotion as well as ampullae and tube feet, a system known as the (*) water vascular system.
Classes within this phylum include Holothuroidea and Crinoidea. Members of this phylum possess ambulacral grooves that assist in food transport and locomotion as well as ampullae and tube feet, a system known as the (*) water vascular system. Members of the most well-known class are known for their ability to regenerate lost arms. This phylum takes its name from the Greek for "spiny skin." For 10 points, name this marine phylum which includes sea urchins, sand dollars, and starfish.
Classes within this phylum include Holothuroidea and Crinoidea.
{Echinodermata} [or {echinoderms}]