Janolus hyalinus
(Alder & Hancock, 1854)

Suborder: ARMININA
Family: Zephyrinidae


Eastern Atlantic from Isle of Man, and Northern Ireland, France, western Mediterranean and Morocco. Also recorded below from the Netherlands.


Zierikzee (Zeelandbrug), de Oosterschelde, the Netherlands. PHOTO: Peter van Bragt.

Grows to about 26mm. Thought (Thompson & Brown, 1984) to feed on species of the bryozoan, Bugula, but Bernard Picton's message suggests they live and feed on Scrupocellaria.

• Thompson, T.E. & Brown, G.H. (1984) Biology of Opisthobranch Molluscs, Vol 2. Ray Society: London.

See Janolus cf. hyalinus for discussion on the identity of a species from Australia and New Zealand considered to be J. hyalinus.

Authorship details
Rudman, W.B., 1999 (August 29) Janolus hyalinus (Alder & Hancock, 1854). [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/janohyal

Related messages

  1. Janolus hyalinus from Europe
    From: Bernard Picton , June 30, 2001
  2. Janolus hyalinus - natural history
    From: Bernard Picton, June 30, 2001
  3. Janolus hyalinus from Holland
    From: René Lipmann, September 4, 1999
  4. Janolus hyalinus from the Netherlands
    From: Peter H. van Bragt, September 3, 1999

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