Duvaucelia lineata (Alder & Hancock, 1848)

15 May, 2011.
Jeanies Reef, Firth of Lorne on the west coast.
20 mm animal at 18 metres. Water temperature 10 C.
Sony NEX-5 in Nauticam housing, 18-55mm lens with Subsea + 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