Pleurobranchus membranaceus (Montagu, 1815)

11 June, 2006.
Rocky Point, Loch Fyne on the west coast .
Between 6 and 10 m there were dozens of big spawn spirals and lots of animals mating, spawning, feeding and hanging about. This is clearly a popular place for this species to frequent. Water temperature 11 ° C.
Fuji E900 in Ikelite housing, Inon WA lens and Inon D-2000 flash.