About Facelina annulicornis (Chamisso & Eysenhardt, 1821)
Facelina annulicornis is a species of sea slug, specifically an aeolid nudibranch. It is a marine gastropod mollusc that belongs to the family Facelinidae. This species has been recorded along the European coastline from County Donegal, Ireland, southwards to Portugal, and also occurs in the Mediterranean Sea. Facelina annulicornis is a predator that feeds on the hydroid Halecium halecium; it is thought to likely also prey on other hydroids, and possibly other aeolid nudibranchs.
