Okenia nodosa (Montagu, 1808)

19 September, 2010.
SS Odense, St. Abbs on the east coast.
6 mm animal at 12 metres. Water temperature 13° C.
Fuji E900 in Ikelite housing, 3 x Inon CU lenses 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