Doto maculata (Montagu, 1804)

21 June , 2009.
Weasel Loch, Eyemouth on the east coast. 
A 10 mm animal from 6 m photographed in the lab
Water temperature 10.5°C.
Fuji E900 with 10x CU lens 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