Onchidoris bilamellata (Linnaeus, 1767)

10 July, 2005.
Queen St. Reef, Moray Firth on the east coast.
The rock surfaces were covered in patches comprising single up to hundreds of animals in a mass spawning agregation at depths from 12 - 14 metres in 11°C water. The reef covers an area approx 400 x 800 metres in a sandy bay and the patches of the animals were reported all over the reef.
Fuji 810 in Ikelite housing with Inon CU lens and 2/D-2000 flashes.