Sea Urchins

A man holds a sea urchin, taken from the sea.

Sea urchins, are typically spiny, globular animals, echinoderms in the class Echinoidea. About 950 species live on the seabed, inhabiting all oceans and depth zones from the intertidal to 5,000 metres. Their hard shells are round and spiny, usually from 3 to 10 cm across. Source: Wikipedia Habitat and Behavior Sea urchins are found in … Read more