Janolus cristatus (delle Chiaje, 1841)

27 July, 2001.
The cliff below the West Pier at Lochaline on the west coast. 
Water temperature 13 deg. C at 20 metres. This 'portrait' of a 40 mm animal was all that would fit into the frame.
Nikonos 5 with 2:1 close up extension tubes and Ikelite 50 flash.

for more information about this species go to one of the links below
scottish nudibranchs

 nudibranchs of the british isles sea slug forum