"Elysia diomedea"@en . . . . . . "* Tridachiella diomedea (Bergh, 1894)" . "* Tridachia diomedea (Bergh, 1894) (original combination)" . . . . "Elysia diomedea is a species of sea slug, a marine gastropod mollusc in the family Plakobranchidae. This sea slug resembles a nudibranch but is not closely related to that order of gastropods, instead belonging to a closely related clade, Sacoglossa, the \"sap-sucking\" sea slugs."@en .