Trinchesia caerulea (Montagu, 1804)

14 May, 2006.
Dunollie Point, Oban on the west coast. 
A 10 mm animal, from the rocky plain to the west of the entry point. Water temperature 9° C at 22 metres
Fuji 810 camera in Ikelite housing, 2 x Inon D-2000 flashes and Inon UCL-165AD CU lenses.

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

 nudibranchs of the british isles sea slug forum