Goniodoris castanea Alder & Hancock, 1845

13 August, 2018.
Geodh Ruadh, Strathy Point on the north coast.
20 mm animal at 18 metres.
Water temperature 12°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