Jorunna tomentosa (Cuvier, 1804)

16 September, 2012.
Greenends Gully on the east coast.
12 mm animal at 12 metres. Water temperature 13° C.
Sony NEX-5 in Nauticam housing, 18-55mm lens with Subsea + 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