Capellinia prietoi is a species of sea slug or nudibranch, a marine gastropod mollusc in the family Eubranchidae.Bouchet, P.(2025). Capellinia prietoi Llera & Ortea, 1981. In: MolluscaBase (2026). Accessed through: World Register of Marine Species on 2026-04-18.
Distribution This species was described from Verdicio, Asturias, Spain, , in the NE Atlantic Ocean. It has been reported from Arcachon Bay, France and SenegalRudman, W.B., 2005 (August 26) Eubranchus prietoi Llera & Ortea, 1981. [In] Sea Slug Forum. Australian Museum, Sydney.Poddubetskaia, M. (2009) Eubranchus prietoi. Nembro. Accessed 2015-01-03. as well as Ghana.Edmunds M. (2015). Opisthobranchiate Mollusca from Ghana: Flabellinidae, Piseinotecidae, Eubranchidae & Embletoniidae. Journal of Conchology. 42(2): 105-124, page(s): 116, figs 6C-D, 7.
Biology Capellinia prietoi was found with the hydroid Plumularia setacea, which is presumed to be its food. It lays short egg coils across the midrib of the hydroid.
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