Cyerce cristallina from southern France

July 30, 2005
From: Fabien Lombard

I've observed this opisthobranch in Villefranche sur mer (France, Mediterranean Sea) during a night dive at 7 metres depth. I think that it's Cyerce cristallina. I have never seen this species here before, and found no eggs or other specimens. I observed some yellow spots on the cerata but they were not as numerous as in the previous observations from Jim Lyle [message #10855 ]

Locality: Villefranche sur mer, France, Mediterranean Sea. Depth: 7 m. Length: 30 mm approximately 18 July 2005. grassy bottom. Photographer: Fabien Lombard

Fabien Lombard

Lombard F, 2005 (Jul 30) Cyerce cristallina from southern France. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear Fabien,
Villefranche sur mer is a very famous locality, often mentioned by French opisthobranch workers as the source of their specimens.

It is good to get some photos of this beautiful animal from the Mediterranean to compare with Jim Lyle's from Mexico. The yellowish spots are almost certainly glands, so the difference in abundance may just reflect a difference in the physiological cycle of the glands.
Best wishes,
Bill Rudman

Rudman, W.B., 2005 (Jul 30). Comment on Cyerce cristallina from southern France by Fabien Lombard. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Cyerce cristallina

Related messages

  1. Cyerce cristallina from Gallipoli - Lido Pizzo
    From: Fabio Crocetta, October 29, 2008
  2. Cyerce cristallina from Formiche di Grosseto
    From: Elisabetta Guerrini, September 3, 2007
  3. New Polybranchia? in Mediterrean Sea
    From: Elisabetta Guerrini, August 30, 2007
  4. Cyerce cristallina from Croatia
    From: Tom Turk, August 28, 2006
  5. Cyerce cristallina from Cozumel, Mexico
    From: Jim Lyle, August 29, 2003
  6. Cyerce cristallina? from Florida
    From: Linda Ianniello, January 26, 2002

Show factsheet and all related messages