Rubramoena rubescens (Picton & Brown, 1978)

29 April, 2011.
Stallion Rock, Loch Fyne on the west coast. 
6 mm animal at 12 m. Water temperature 8.5°C.
Sony NEX-5 in Nauticam housing, 18-55mm lens, SubSee +10 dioptre 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