Rubramoena rubescens (Picton & Brown, 1978)

27 August, 2014.
12.9 Mile mark, Loch Fyne on the west coast .
3 mm animal on hydroid, possibly Halecium halecium, at 16 metres. Water temperature 12.5°C.
Sony α6000  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