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 deg 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
scottish nudibranchs

 nudibranchs of the british isles sea slug forum