Tritonia plebeia Johnston, 1828

31 March, 2002.
West of Manse Reef, Loch Leven on the west coast.
Water temperature 8° C at 15 metres. These 2 spirals, the larger 10mm diameter, were found next to yellow and white Alcyonium digitatum (Dead Men's Fingers), but no nudibranchs were seen. The ID was made by Dr Bernard Picton of The Field Guide to the Nudibranchs of the British Isles fame.
Nikonos 5 with 1:1 extension tube and Nikonos 105 flash.

for more information about this species go to one of the links below
OPK - Opistobranquis nudibranchs of the british isles sea slug forum