Zeelandbrug, Oosterschelde, the Netherlands. July 30, 2000. Photo: Peter H. van Bragt.
Thompson describes animal as having a "white body with a rosy blush on the rhinophores and elsewhere on the head, the digestive gland showing through the skin red-brown". The colour tends to fade in unfed animals. There is a conspicuous brownish duct of the digestive gland down each side of the body giving off a branch to each ceras.
Feeds on red algae Griffithsia, Delesseria, and Heterosiphonia. Reported to have a distinctive smell, likened to the Geranium plant and sulphuric acid, by different authors. Grows to about 20mm.
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• Montagu, G. (1815) An account of some new and rare British shells and animals. Transactions of the Linnean Society of London, 11(2): 179-204.
• Thompson, T.E. (1976) Biology of Opisthobranch Molluscs. Vol 1.. Ray Society: London.
Rudman, W.B., 2000 (August 4) Hermaea bifida (Montagu, 1815). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/hermbifi
Hermaea bifida - Norway
From: Bjørnar Nygård, April 9, 2010
Hermaea bifida? from the Scapa Flow
From: Stefanie Buell, April 24, 2008
Hermaea bifida from the Scottish west coast.
From: Jim Anderson, May 26, 2005
Hermaea from Mediterranean
From: Jean-Pierre Bielecki , May 26, 2001
Hermaea bifida from France
From: Jean Pierre Bielecki, February 7, 2001
More photos of Hermaea bifida
From: Peter H. van Bragt , September 30, 2000
Re: Hermaea bifida from the Netherlands????
From: Juan Lucas Cervera, August 25, 2000
Re: new species for the Netherlands????
From: Peter H. van Bragt, August 9, 2000
Re: A new species for the Netherlands????
From: Juan Lucas Cervera, August 6, 2000
A new species for the Netherlands????
From: Peter H. van Bragt, August 5, 2000