Pleurobranchus membranaceus (Montagu, 1815)

3 June, 2012.
South Gortein, Loch Fyne on the west coast.
2 x 90 mm mating animals at 10 metres in 10°C water. Many animals and many spawn masses seen between 15 and 8 metres on both dives.
Canon S100 in Ikelite housing, SubSee +5 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