Geitodoris planata (Alder & Hancock, 1846)

8 April, 2015.
Inverkip Pier, Firth of Clyde on the west coast.
30 mm animal at 6 metres - one of several seen between 7 - 5 metres. Water temperature 8°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