Rubramoena rubescens is a species of sea slug, an aeolid nudibranch, a marine gastropod mollusc in the family Trinchesiidae.Bruce, M.; (2026) Rubramoena rubescens Picton & Brown, 1978. Accessed through: World Register of Marine Species on 2026-03-31
Distribution This species was described from St. John's Point, Dunkineely, County Donegal, Ireland. It has been reported from the NE Atlantic from Norway south to Cornwall.Picton, B.E. & Morrow, C.C., 2010. Cuthona rubescens Picton & Brown, 1978.[In] Encyclopedia of Marine Life of Britain and Ireland.
Description The typical adult size of this species is 12–15 mm. It is very similar to Rubramoena amoena, apart from differences in the colour pattern.Thompson, T.E. and Brown, G.H., 1984. Biology of Opisthobranch Molluscs, Volume II. The Ray Society. 229 pages 41 plates, 40 figures, p. 125.
Habitat Rubramoena rubescens feeds on hydroids of the genus Halecium especially Halecium halecinum.
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