Antiopella cristata (delle Chiaje, 1841)

24 July, 2011.
Lochside Cottages, Loch Leven on the west coast.
30 mm animal at 10 metres. Water temperature 12.5°C.
Sony NEX-5 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