Limacia clavigera (Müller, 1776)

2 October, 2011.
Rubh na Crannaig, Eigg on the west coast.
20 mm animal at 8 metres. Water temperature 13°C.
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