# Echinoderms

Echinoderms are marine animals (animals that live in the ocean). They have arms or spines that radiate from the center of the body. The central body contains the organs and the mouth, which is used for feeding.

Sea stars, commonly known as starfish, have five or more arms attached to the body.

Sea urchins have many spines connected to the body. These spines help to protect them from predators.