Polycera quadrilineata (Müller, 1776)

11 July, 2010.
Legger Buss, Eyemouth on the east coast.
A trio of animals feeding and mating on kelp. The larger is approx 28 mm.
Water temperature 10° C.
Fuji E900 camera in Ikelite housing, 2 x Inon CU lenses 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