Acanthodoris pilosa (Abildgaard in Müller, 1789)

24 August, 2015.
Bo Fascadale, Sound of Eigg on the west coast .
30 mm animal spawning at 14 metres with 15 mm nearby.
Water temperature 13.5°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