Rubramoena amoenaRubramoena amoena is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.DistributionThis species was described from Torbay, Devon, England. It has been reported from the NE Atlantic from Orkney south to Portugal and in the Mediterranean Sea.DescriptionThe typical adult size of this species is 5–12 mm.HabitatRubramoena amoena feeds on hydroids of the genus Halecium.