Jorunna tomentosa (Cuvier, 1804)

11 July, 2015.
The wreck of the SS Seniority, Barra in the Outer Hebrides on the west coast of Scotland.
50 mm diameter spawn mass at 20 metres on a piece of the wreck. Water temperature 11°C.
Sony α6000  in Nauticam housing, 18/55 mm 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