Facelina auriculata (Müller, 1776)

27 May, 2015.
Eilean Na H-Eairne, Sound of Jura on the west coast.
35 mm animal at 16 metres. Water temperature 9.5°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