Thickclaw Porcelain Crab

Pachycheles rudis, the thickclaw porcelain crab or big-clawed porcelain crab, is a species of porcelain crab in the family Porcellanidae. It is found on the coast of the East Pacific from Baja California to Kodiak, Alaska. It is a filter feeder and may be found in "crevices, nooks, and interstices, and is often at home in the discarded and Alcyonidium-lined shells of barnacles."