Hypselodoris flavomarginata is a species of sea slug or dorid nudibranch, a marine gastropod mollusk in the family Chromodorididae.MolluscaBase (2018). Hypselodoris flavomarginata Rudman, 1995. Accessed on 2019-01-17.

Distribution This nudibranch is known only from New Caledonia in the southern Pacific Ocean.Rudman, W.B., 1999 (April 13) Hypselodoris flavomarginata Rudman, 1995. [In] Sea Slug Forum. Australian Museum, Sydney.

Description Hypselodoris flavomarginata has a pink body and a wide light-yellow mantle edge. A thinner white line separates the yellow mantle from the pink body and dorsum. The gills and rhinophores are white and dark-pink. This species can reach a total length of at least 25 mm and feeds on sponges.Gosliner, T.M., Behrens, D.W. & Valdés, Á., 2018. Nudibranch and Sea Slug Identification - Indo-Pacific. New World Publications; 2nd Revised, Updated edition (1 Nov. 2018) 452 pp. , , p. 196

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