Diaphoreolis viridis (Forbes, 1840)

20 June, 2017.
Greenends Gulley, Eyemouth on the east coast .
13 mm animal at 12 metres.
Water temperature 12°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
nudibranchs of the british isles sea slug forum