Facelina bostoniensis (Couthouy, 1838)

28 September 2003.
Ellice Shoal, Loch Hourn on the west coast.
At 18 metres, a 20 mm long animal. Water temperature 13 deg C.
Nikon 90SX with 105mm lens in Subal housing and housed SB26 flash

for more information about this species go to one of the links below
scottish nudibranchs

 nudibranchs of the british isles sea slug forum