Facelina auriculata (Müller, 1776)

1 October, 2011.
East Coast Reef, Hyskeir on the west coast.
20 mm animal at 7.5 metres in 13°C water.
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