Trinchesia caerulea (Montagu, 1804)

25 March,2001.
At Lephinchapel Reef, Loch Fyne on the west coast.
12 mm long animal on hydroid at 16 metres in 7 deg C water and photographed with 2:1 close up extension tubes on Nikonos 5 and single Ikelite 50 flash.

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

 nudibranchs of the british isles sea slug forum