Facelina auriculata (Müller, 1776)

24 August, 2015.
Bo Fascadale, Sound of Eigg on the west coast.
28 mm animal at 14 metres. 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