. . "Elysia catulus is a small species of sea slug, a marine gastropod mollusc in the family Plakobranchidae. This sea slug resembles a nudibranch, but it is not closely related to that order of gastropods, instead it is a sacoglossan. The specific name \"catulus\" comes from the Greek and means \"little cat\", referring to the superficial resemblance that the head of this slug bears to the head of a cat."@en . . . "Elysia catulus"@en . . . . . .