Acanthodoris pilosa (Abildgaard in Müller, 1789)

15 June, 2017.
Greenends Gulley, Eyemouth on the east coast .
15 mm animal at 12 metres
Water temperature 10°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
OPK Opistobranquis nudibranchs of the british isles sea slug forum