a pacific ocean ochre starfish

asteriidae asteroidea beach british britishcolumbias california canada change climate coast coastal coastline columbia crevices diverse dock echinoderm ecology ecosystem fish five forcipulatida found health indicator intertidal keystone life marine mussel northwest ocean ochraceus ochre pacific pisaster pool population predator purple radial rays rocks rocky sea sechelt shore shoreline species star starfish sunshine symmetry syndrome tidal tide vibrant wasting wildlife