This is a beautiful white sea urchin.
You can see his mouth
He was in the water where the Turtle lives.
Sea Urchins are round in shape. They are covered in spines. They can grow up to 9 cm wide.
Purple Sea Urchins eat seaweed and algae.
Purple Sea Urchins are grazers. Their mouth is on the underside of their body. They use their powerful jaws and teeth to scrap food off rocks.
Octopuses, crabs and fish eat Sea Urchins.
Purple Sea Urchins' spines are strong enough for them to dig small holes into rocks. They can chew the surface of the rocks, making a hole in which to hide.
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