Doto hystrix Picton & Brown, 1981

23 August, 2017.
4.5 Metre Rock, Loch Nevis on the west coast .
10 mm animal at 22 metres.
Water temperature 13°C.
Sony α6000  in Nauticam housing, 50 mm Zeiss lens 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