Doris pseudoargus (Rapp, 1827)

21 October, 2011.
Lephinchapel, Loch Fyne on the west coast.
75 mm animal at 14 metres in 12.5°C water.
Sony NEX-5 in Nauticam housing, 18-55mm 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