Facelina bostoniensis (Couthouy, 1838)

May 2001.
At Ballachullish, Loch Leven on the west coast.
On the dinghy attached to the concrete hull of the yacht wreck in 10 metres. A 19 mm long individual in 10° C.
Nikon 90SX with 105mm lens in Subal housing, housed SB26 flash and Nikon 105 slave.

for more information about this species go to one of the links below
OPK - Opistobranquis

 nudibranchs of the british isles sea slug forum