Pentidotea (Idotea) wosnesenskii “Kelp Isopod” Isopoda
Olympic National Park, WA
June 1, 2013
Robert Niese
This is an abundant intertidal crustacean that feasts on algae growing among mussel and barnacle beds throughout northern Pacific rocky coastlines. They range in color from purple to red to brown to green, depending on their current algae diet.
Northwest Naturalist 