Pisaster ochraceus, generally known as the purple sea star, ochre sea star, or ochre starfish, is a common starfish found among the waters of the Pacific Ocean and along most of athe Alaskan Western shore. It has wasting disease as seen by the decay of tissue.
We found this Pisaster scavenging on the remains of a bony fish near a wharf. A dead fish obviously had been thrown from the wharf and thus became available to a seastar that could not have caught the living animal. Depth 16 m.