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SEA URCHINS (Echinoidea)
Biodiversity > Marine Life > Echinoderm > Sea urchins

Sea Urchins (Class Echinoidea) are covered in spines that vary considerably in length with different species. These spines are used for walking as well as for protection. Sea urchins possess dozens of thin tube feet that can be seen waving around amongst the spines. These tube feet have suction discs and are used to grip the surface, and to remove debris washed onto the urchin's body.
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