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Sea stars are also known as starfish. They are spiny, hard-skinned animals the live on the rocky floor of the ocean. They move very slowly by using hundreds of tiny tube feet. There are over 2,000 different species of sea stars around the world.
Sea stars are meat-eaters. They eat clams, oysters, coral, fish, and other animals. They eat by pusing their stomach out through their mouth and digest the prey.
Most sea stars have five arms that expand from a central disk. They do not have a brain. The have a ring of nerve cells that move information around the body. If a sea star's arm is cut off, it will regrow a new one.