Tritonia hombergii Cuvier, 1803

5 September, 2018.
Rubh Ruadh, Loch Hourn, on the west coast.
185 mm adult animal at 18 metres.
Water temperature 13°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