Echinoderms
Definition of Echinoderms Hierarchical Category as it relates to Animals, Amphibians
A group of marine animals known for their radial symmetry, unique water vascular system, and spiny skin, which encompasses a wide range of species including sea stars, sea urchins, and sand dollars. Despite being invertebrates, echinoderms are closely related to vertebrates such as amphibians, due to their deuterostome development.