What are some examples of echoinoderms?

Answer 1

Echinoderms are a diverse group of marine animals characterized by their radial symmetry and water vascular system. Examples include starfish (or sea stars), sea urchins, sand dollars, and sea cucumbers. Other notable echinoderms are brittle stars and crinoids (sea lilies). These organisms play essential roles in marine ecosystems and exhibit a wide range of forms and behaviors.