Their range occurs from Northern Japan and Alaska to Baja California. In Southeast Alaska, the red sea urchin occurs primarily on rocky shorelines of the outside coast with largest concentrations in southern southeast. They can inhabit intertidal depth to up to 90 m.
0 – 18 cm in diameter
From Northern Japan and Alaska to Baja California, intertidal to 90 m depth
Sea otters and star fish
Males and females, broadcast spawners, external fertilization