Favorinus branchialis (Rathke, 1806)

12 August, 2018.
Ainsley Gulley, Orkney Islands to the north of Scotland.
25 mm animal at 14 metres. Water temperature 12°C.
Sony α6000  in Nauticam housing, 50 mm Zeiss 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