Tergipes tergipes (Forsskål, 1775)

24 March , 2011.
Portencross Pier, Firth of Clyde on the west coast. 
2.5 mm animals found on a pier leg at 4.5 m. Water temperature 6°C.
Sony NEX-5 in Nauticam housing, 18-55mm lens, SubSee +10 dioptre and Inon D-2000 flash in the lab.

for more information about this species go to one of the links below
OPK - Opistobranquis nudibranchs of the british isles sea slug forum