Aeolidia papillosa (Linnaeus, 1761)

23 August, 2015.
Island Rock, Loch Hourne on the west coast.
A 55 mm animal feeding at 16 metres. Water temperature 13.5°C.
Sony α6000  in Nauticam housing, Zeiss 50 mm macro lens and 2 x Inon D-2000 flashes.

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