Phyllidiopsis dautzenbergiPhyllidiopsis bayi is a species of sea slug, a dorid nudibranch, a shell-less marine gastropod mollusk in the family Phyllidiidae.DistributionThis species was described from the Red Sea. It is endemic to the southern Red Sea and the Gulf of Aden.DescriptionThis nudibranch has a translucent white dorsum with black lines creating a central ring with lines running off at right angles to the margin. At the margin they widen slightly, giving the appearance of cut-off circular patches of white. It is a small Phyllidiid, growing to 20 mm in length.DietThis species feeds on a sponge.