Onchidoris bilamellata (Linnaeus, 1767)

13 July, 2003.
The Yetts, Dunbar on the east coast.
Water temperature 12° C. At around 6 metres there were many patches of animals with their spawn on the rocky reef. Patches of spawn and nudibranchs were also seen at the adajcent reefs at Johnston's Hole, 800 mertres to the east. Another mass spawning event.
Olympus C-2020Z in Olympus PT-010 housing with +4 dioptre using the internal flash .

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

nudibranchs of the british isles sea slug forum