Defines echinoderms, such as sand dollars and crown-of-thorns sea stars, and describes their physical characteristics, life cycles, habitats, sense, food, and m

Defines echinoderms, such as sand dollars and crown-of-thorns sea stars, and describes their physical characteristics, life cycles, habitats, sense, food, and m

Echinoderms, the star fish skeletons that beachcombers collect, are brilliantly colored and intricately ornamented creatures in their natural habitat. This refe