Doris pseudoargus (Rapp, 1827)

8 June, 2014.
Jenny's Reef, Loch Long on the west coast.
35 mm animal with spawn at 12 m. Water temperature 9° C.
Sony NEX-5 in Nauticam housing, 50 mm macro 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