Doto fragilis (Forbes, 1838)

19 April, 2015.
12.9 Mile Mark, Loch Fyne on the west coast .
20 mm with spawn at 20 metres. Water temperature 8°C.
Sony α6000  in Nauticam housing, 50 mm Zeiss Touit 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