Onchidoris bilamellata (Linnaeus, 1767)

26 August, 2015
Armadale Wall, Skye on the west coast .
30 mm animal at 16 metres - one of several thousand seen, with many spawn masses. Water temperature 13.5°C.
Sony α6000  in Nauticam housing, 50 mm Zeiss Touit 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