Eubranchus vittatus(Alder & Hancock, 1842)

04 August, 2002.
Lochside Cottages, Ballachulish, Loch Leven on the west coast. 
Water temperature 13°. C at 32 metres.
A 10mm long animal, one of several observed among Halecium halecium hydroid on the rocky reef to the north of the point.
Subal, Nikon 90 with 105mm, Ikelite 50 flash and Nikonos 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