Aeolidia papillosa (Linnaeus, 1761)

24 March , 2011.
Portencross Pier, Firth of Clyde on the west coast. 
A 65 mm animal at 4 metres. Water temperature 7°C.
Sony NEX-5 in Nauticam housing, 18-55mm lens and Inon D-2000 flash.
for more information about this species go to one of the links below
OPK - Opistobranquis nudibranchs of the british isles sea slug forum