Cuthonella concinna (Alder & Hancock, 1843)

6 June, 2015.
Black Carr, St Abbs on the east coast.
12 mm animal at 14 metres. Water temperature 9°C.
Sony α6000  in Nauticam housing, Zeiss 50 mm macro 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