Elysia viridis (Montagu, 1804)

9 September, 2012.
Robbers Rock, Loch Fyne on the west coast .
12 mm long specimen, one of several, found at 8 metres. Water temperature 13°C.
Sony NEX-5 in Nauticam housing, 18-55mm lens, SubSee +10 dioptre and 2 x Inon D-2000 flashes.

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