Doto hystrix Picton & Brown, 1981

23 August, 2014.
The Thesis wreck, Sound of Mull on the west coast.
15 mm animal with spawn on hydroid nearby at 18 m. Water temperature 13°C.
Sony α6000  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