Colpodaspis pusilla M. Sars, 1870

9 June 2013.
Emma's Reef, Firth of Lorne on the west coast.
3mm animal, one of several seen between 20-25 m. Water temperature 9° C.
Sony NEX-5 in Nauticam housing, 18-55mm lens, SubSee +10 dioptre and Inon D-2000 flash.
for more information about this species go to one of the links below
OPK - Opistobranquis Encyclopedia of Marine Life of Britain and Ireland Sea Slug Forum