Eubranchus exiguus (Alder & Hancock, 1849)

20 April, 2008.
Ardcastle Jetty, Loch Fyne on the west coast. Two of many 3 mm animals on hydroids with spawn at 9 - 12 metres. Water temperature 8° C.
Fuji E900 camera in Ikelite housing, 2 x Inon D-2000 flashes and 3 x CU lens.

for more information about this species go to one of the links below
OPK - Opistobranquis

 nudibranchs of the british isles sea slug forum