Favorinus branchialis (Rathke, 1806)

17 July, 2005.
Weasel Loch, Eyemouth on the east coast. A 25mm long specimen found at 6 metres on the left gulley feeding on the Onchidoris bilamellata spawn in the 13°C water.
Olympus 5050 in PT-015 with DML-2 CU and 2xInon 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