Arctic and North Atlantic from intertidal to 800m. Spitzbergen & White Sea, Iceland, Greenland, and on the European coast from Norway to northern Spain. On North American coast south to Massachusetts.
UPPER: Near the wreck of the little concrete yacht at Ballachulish, Loch Leven, west coast, Scotland. 12 metres, 32mm long. 13 May, 2001. LOWER: Avon Rock in the Sound of Mull, Scotland. 16 metres, 24mm long. June 1995. PHOTOS: Jim Anderson. [Scottish Nudibranchs]
Usually white, sometimes with a number of milky yellow glands on the mantle skirt. In rare cases the edge, or the whole mantle is tinged with yellow. It feeds on encrusting slime sponges, in particular Halisarca dujardini. It appears to be a winter breeder, the eggs hatching in about 50 days as small crawling slugs, with no planktonic larval stage.
• Bleakney, J.S., (1996) Sea Slugs of Atlantic Canada and the Gulf of Maine
• Thompson, T.E. & Brown, G.H. (1984) Biology of Opisthobranch Molluscs, Vol 2. Ray Society: London.
Rudman, W.B., 2001 (July 4) Cadlina laevis Linnaeus, 1767. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/cadllaev
Cadlina laevis from France
From: Wilfried Bay-Nouailhat, June 29, 2006
Cadlina sp from Portugal
From: Miguel Macedo, September 6, 2005
Cadlina laevis from Scotland
From: Jim Anderson, July 9, 2001
Cadlina laevis & C. cf. luteomarginata
From: Bernard Picton , July 9, 2001