Emarcusia morroensisEmarcusia morroensis, common name Morro Bay Aeolid, is a species of sea slug, specifically an aeolid nudibranch. It is a marine gastropod mollusc in the family Facelinidae.DistributionThe holotype of this species was found at Morro Bay, San [Luis Obispo County], California. It is found on the Californian coast from Fort Baker, Marin County to San Diego.