Acanthodoris pilosa (Abildgaard in Müller, 1789)

13 November, 2011.
12.9 Mile mark, Loch Fyne on the west coast. 
A mating pair, 35 mm and 25 mm, at 19 m. There were at least 10 individual animals and spawn from 35 - 10 mm over an area of 10 m dia on the reef ledge. Water temperature 12°C.
Sony NEX-5 in Nauticam housing, 18-55mm lens, +5 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