Acanthodoris pilosa (Abildgaard in Müller, 1789)

13 August, 2014.
The south end of Calve Island, Sound of Mull on the west coast .
2 x 28 mm animals with spawn on the finger bryazoan, Alcyonidium diaphanum, at 18 metres. Many animals from 15 - 35 mm size with spawn and in a range of colours between the two forms above.
Water temperature 13°C.
Sony α6000  in Nauticam housing, 18-55mm lens, SubSee +10 dioptre 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