Echinodermata
Echinoderms are all marine animals. They include starfish, sea urchins, sand dollars, and sea cucumbers. You may recognize echinoderms by their radial symmetry. For example, starfish have triangular portions of their body that radiate out in all directions. Echinoderms have a water vascular system and calcitic skeleton. Echinoderms mainly reproduce though sexual reproduction.