Fjordia browni (Picton, 1980)

30 April, 2006.
South Gortein Reef, Loch Fyne on the west coast. 
On the cable at 18 metres in 8°C water, a 40 mm long animal.
Fuji 810 in Ikelite housing with DML-2 CU and 2 x Inon D-2000 flashes

for more information about this species go to one of the links below
nudibranchs of the british isles sea slug forum