Aeolidia papillosa (Linnaeus, 1761)

15 May, 2013.
Inverkip Pier, Firth of Clyde on the west coast.
Small group of 5 animals, the larger being 55 mm animal, at 8 metres Big spawn masses and many more specimens also seen. Water temperature 8.5°C.
Sony NEX-5 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