Doto fragilis (Forbes, 1838)

1 July, 2016.
Lephinchapel, Loch Fyne on the west coast.
6 mm animal at 15 metres. Water temperature 10C.
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