Rubramoena rubescens (Picton & Brown, 1978)

9 September, 2012.
Robbers Rock, Loch Fyne on the west coast. 
8 mm animal 8 m. Water temperature 13°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