"Glaucus atlanticus" is a blue pelagic aeolid nudibranch. Snail and nudibranch species are two common grazers of epiphytes. Colemani shrimps, Bobbit worms, cowries and nudibranch (563 species already identified). Berghia stephanieae is a species of sea slug, an aeolid nudibranch. Berghia coerulescens is a species of sea slug, a marine nudibranch in the family Aeolidiidae. Aeolidiella glauca is a species of sea slug, an aeolid nudibranch in the family Aeolidiidae. Facelina bostoniensis is a species of sea slug, an aeolid nudibranch in the family Facelinidae. The bright colours of this nudibranch species are an aposematic warning to predators. The species is named for the renowned nudibranch taxonomist Dr. Richard C. Willan. Pteraeolidia ianthina is a sea slug, an aeolid nudibranch in the family Facelinidae. This nudibranch species was described from the Philippines. "Eliotia" , a nudibranch genus was named after him. Here the nematocysts mature and are then used by the nudibranch for its own defense. The word "nudibranch" comes from the Latin "naked" and the Ancient Greek () "gills". Present information suggest that this nudibranch feeds exclusively on the stalked ascidian "Sigillina cyanea".