Goniodoris castanea Alder & Hancock, 1845

18 June, 2017.
The President, Eyemouth on the east coast .
30 mm animal at 14 metres.
Water temperature 11°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