Phyllidiella rosans

Phyllidiella rosans is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.

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.

Description
This nudibranch has a black dorsum with longitudinal pink ridges. The rhinophores are black.

Diet
This species feeds on a yellow sponge.