Trinchesia alphaTrinchesia alpha is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.DistributionThis species was described from the shore of Kozuchi-jima near the Tamano Marine Laboratory, Tamano, Seto [Inland Sea|Inland Sea of Seto], Japan; it also occurs off New Zealand.DescriptionThe typical adult size of this species is 13–15 mm.