Eubranchus viriola (Korshunova et al., 2020)

8 August, 2015.
Skelly's Hole, St. Abbs on the east coast.
18 mm animal at 12 metres. Water temperature 13°C.
Sony A6000  in Nauticam housing, Zeiss 50 mm macro lens and 2 x Inon D-2000 flashes.