Appearance
This nudibranch has a black dorsum with longitudinal pink ridges. The rhinophores are black.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 [In] Sea Slug Forum. Australian Museum, Sydney.Food
This species feeds on a yellow sponge.References:
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