Rubramoena rubescens (Picton & Brown, 1978)

17 March, 2013.
13 Mile Mark, Loch Fyne on the west coast. 
8 mm animal 13 m. Water temperature 7°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