Onchidoris bilamellata (Linnaeus, 1767)

17 January, 2015
Calve Island, Sound of Mull on the west coast .
30 mm animal at 17 metres - one of several seen and one spawn mass. Water temperature 8°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