Facelina bostoniensis (Couthouy, 1838)

24 July, 2009
Pennygowan Quarry, Sound of Mull on the west coast. 
35 mm animal at 14 metres. Water temperature 13 °C.
Fuji E900 in Ikelite housing with Inon CU lens and 2 x Inon D-2000 flashes.

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

nudibranchs of the british isles sea slug forum