Sea urchins are spiky and are black and green and eat algae.

Blue gropers eat them.

They live on rocks.

Sea urchins are a very spiky  ball. Their spikes are made up of hundreds of spines.

Some of their spikes can be up to 15cm long!

Sea urchins live on and near rocks.

They DO NOT  live on the sand.

They crawl and creep. They live alone.

Sea urchins eat seaweed and other sea grasses.

They can't bend their bodies.

They have to crawl on top of their food before their mouths can reach the food.

DO NOT STEP ON THEM! THEY WILL HURT YOU!!

Chris