Fjordia lineata (Loven, 1846)

7 April, 2013.
Elizabeth Rock, Ardnamurchan on the west coast. 
33 mm animal at 14 m. Water temperature 5.9°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