Janolus cristatus (delle Chiaje, 1841)

04 August, 2002.
Lochside Cottages, Ballachulish, Loch Leven on the west coast. 
Water temperature 13 deg. C at 12 metres.
These two animals, approx 40mm long, were found within 75mm of each other on the old slate jetty.
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
scottish nudibranchs

 nudibranchs of the british isles sea slug forum