Phyllidia guamensis is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.Bouchet, P. (2015). Phyllidia guamensis (Brunckhorst, 1993). In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2016-10-27.
Distribution This rare species was described from Guam. It has been reported from the Northern Mariana Islands and the Marquesas Islands.Rudman, W.B., 1999 (July 15) Fryeria guamensis Brunckhorst, 1993. [In] Sea Slug Forum. Australian Museum, Sydney.
Description This nudibranch has a black dorsum with large yellow-capped tubercles surrounded by pale blue rings. Towards the edge of the mantle these tubercles become small and increasingly numerous, without any yellow caps. The rhinophores are yellow.
Diet This species feeds on a sponge.
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