The five bony teeth of the sea urchin were given to the original created kind to help it scrape algae (its food) from rocks. The sea urchin also uses its teeth to “carve” away a depression in the rock where it will then settle and grab hold. This feature provides this creature with food and protection.
CLASS: Echinoidea (heart urchins, sand dollars, and sea urchins)
GENUS/SPECIES: Strongylocentrotus purpuratus
Size: Average 3.5 in (9 cm)
Diet: Algae, plankton, and seaweed
Habitat: Shallow waters off North America’s Pacific coast from Alaska to Baja California