Doto hystrix Picton & Brown, 1981

31 May, 2013.
Lephinchapel, Loch Fyne on the west coast. 
2 x 6 mm animals with spawn at 15 m. Water temperature 8.5°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
  nudibranchs of the british isles sea slug forum