Eubranchus farrani (Alder & Hancock, 1844)

16 April, 2016.
Rubh nan Dunain, Skye on the west coast.
6 mm animal at 12 metres. Water temperature 8°C.
Sony ?6000  in Nauticam housing, Zeiss 50 mm macro lens and 2 x Inon D-2000 flashes.