Okenia nodosa (Montagu, 1808)

09 May, 2010.
Lephinchapel, Loch Fyne on the west coast.
18 mm animal at 6 metres. Water temperature 8.5° C.
Fuji E900 in Ikelite housing, 2 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