Goniodoris castanea Alder & Hancock, 1845

10 August, 2014.
Lochside Cottages, Loch Leven on the west coast .
38 mm specimen on a rock at 10.2 metres.
Water temperature 13°C.
Sony α6000  in Nauticam housing, 18-55mm 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