Aeolidia papillosa (Linnaeus, 1761)

6 March 2013.
Inverkip Pier, Firth of Clyde on the west coast.
Part of a group of animals around 55-65 mm in size on a pier leg at 6 m. Abundant agrregations feeding, mating and spawning on the pylons around 5-8 m. Water temperature 6.5° 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