Coryphella verrucosa (M. Sars, 1829)

March 2000.
Finnart Pier, Loch Long on the west coast.
This pair were among a large number egg laying in their clock spring spirals. They were found during a day dive between 12 and 18 metres on several of the pier legs.

for more information about this species go to one of the links below
OPK - Opistobranquis nudibranchs of the british isles sea slug forum