Doris pseudoargus (Rapp, 1827)

9 August, 2015.
Near Tye's Tunnel, St. Abbs on the east coast.
A 45 mm animal at 18 metres. Water temperature 13°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
OPK - Opistobranquis nudibranchs of the british isles sea slug forum