Phyllidiella rosans is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.Bouchet, P. (2015). Phyllidiella rosans (Bergh, 1873). In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2016-11-05.
Distribution This species was collected in Tahiti by Andrew Garrett and sent to both William Harper Pease and Rudolph Bergh. Pease described it in 1868 as Phyllidia nigra but this name was preoccupied by Phyllidia nigra van Hasselt, 1824. Bergh described it as Phyllidia rosans in 1873. It has been reported from Hawaii and Fiji. Reports of this species from the Maldives, Tanzania and other Indian Ocean localities may be a distinct species.Rudman, W.B., 1999 (September 12) Phyllidiella rosans (Bergh, 1873). [In] Sea Slug Forum. Australian Museum, Sydney.Pittman, C & Fiene, P. (2016) Phyllidiella rosans (Bergh, 1873) Sea Slugs of Hawaii.
Description This nudibranch has a black dorsum with longitudinal pink ridges. The rhinophores are black.
Diet This species feeds on a yellow sponge.Johnson, S. & Johnson, J. (2016) Phyllidiella rosans (Bergh, 1873) Kwajalein Underwater.
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