Sea Star Facts | Facts about Sea Stars

Are starfish fish?

Starfish aren't fish, so scientists prefer to call them sea stars.

Sea stars can regrow lost arms, and some can regrow a whole body from a single arm.

Sea stars have a simple eye at the tip of each arm.

Sea stars push their stomachs out of their bodies to eat.

Sea stars have no blood and use seawater to move nutrients through their bodies.

Sea star wasting disease, which began in 2013, killed billions of sea stars along the Pacific coast.

There are about 2,000 species of sea stars.

Sea stars move using hundreds of tiny tube feet.

The crown-of-thorns starfish eats coral and can damage reefs.

Some sea stars, like the sunflower sea star, can have more than 20 arms.