Known from Atlantic coast of France, and Tunisia
southern section of Lac de Tunis, Tunis, Tunisia, North Africa. Depth: 0 to 1m, Between January and March, 2003. Photo: Anis
Its shape is typical for the genus, with a broad foot, many rows of cerata, and long oral tentacles. Known primarily from the original description where its anatomy is fully described as are aspects of its natural history. The anterior part of the head is cream and an opaque white line runs out along the dorsal side of the oral tentacles. Behind the white line is a blak line. The brownish rhinophores are relatively short. There is also a grey or black oblique line running along the inside edge of the anteriormost ceratal row on each side. In the dorsal midline, in the anterior half of the body, between the cerata are a pair of grey-black lines. The cerata range in colour from some with just the brownish digestive gland showing through a translucent ceratal wall to longer ones with a subapical black spot, and just below a path of yellow.
Tardy reported that it burrowed in soft sediments and fed on sea anemones, the frst information on the biology of any species of the genus. We now know that burrowing is typical for the genus, and suspect they all feed on sea anemones. Previously known from the Atlantic coast of France. The largest specimen reported by Tardy was 16mm long alive.
• Tardy, J. (1965). Description et biologie de Cerberilla bernadetti, espèce nouvelle de Gastéropode Nudibranche de la côte atlantique française: discussion sur la position systématique du genre. Bulletin de l'Institute Océanographique. Monaco, 65(1349): 1-22, 6 plates.
Rudman, W.B., 2003 (May 4) Cerberilla bernadettae Tardy, 1965. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/cerbbern