Phyllidia polkadotsaPhyllidia polkadotsa 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 Hawaiian Islands.DescriptionThis nudibranch has a yellow or orange coloured dorsum with large round black spots which are surrounded by a paler, translucent, ring. There are three longitudinal ridges along the back and small, scattered, tubercles.DietThis species feeds on a sponge.