Phyllidia undula is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.Bouchet, P. (2015). Phyllidia ocellata undula Yonow, 1986. In: MolluscaBase (2015). Accessed through: World Register of Marine Species on 2016-10-30.
Description This species has previously been confused with Phyllidia ocellata.Yonow, N. 1996. Systematic Revision of the Family Phyllidiidae in the Indian Ocean Province: Part 1 (Opisthobranchia: Nudibranchia: Doridoidea). Journal of Conchology 35: 483-516.
Distribution This species was described from the Red Sea. It appears to be confined to the western Indian Ocean including the Red Sea, the African coast and the Island of Réunion.Bidgrain, P. (2016). Phyllidia ocellata colour forms on Réunion. Sea Slugs from southwest Indian Ocean.
Diet This species feeds on a sponge.
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