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. Identified as a keystone species, P. ochraceus is considered an important indicator for the health of the intertidal zone.

Pisaster ochraceus. Retrieved May, 08 2021, from en.wikipedia.org/wiki/Pisaster_ochraceus.