Adalaria proxima (Alder & Hancock, 1854)

17 April , 2011.
Dunollie Point, Oban on the west coast. 
15 mm animal on kelp at 9 m. Water temperature 8°C.
Sony NEX-5 in Nauticam housing, 18-55mm lens, SubSee +10 dioptre and 2 x Inon D-2000 flashes.

for more information about this species go to one of the links below
OPK - Opistobranquis

Nudibranchs of the British Isles Sea Slug Forum