Onchidoris bilamellata (Linnaeus, 1767)

31 August, 2003.
Eilean Balnagowan Island, Loch Linnhe on the west coast.
Water temperature 14° C. At around 16 metres there were many patches of animals with their spawn on the rocky reef and rocks on flat gravel and sand areas. Another mass spawning event.
Olympus C-2020Z in Olympus PT-010 housing with 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