Pleurobranchus membranaceus (Montagu, 1815)

31 May, 2013.
Lephinchapel, Loch Fyne on the west coast.
75 mm animal and spawn at at 8 metres in 8.5°C water.
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 Encyclopedia of Marine Life of Britain and Ireland sea slug forum