(Alder & Hancock, 1854)
January 2000, Loch Fyne at Lephinchapel Reef.
There were several of these 10mm long animals on the kelp fronds at 4-5 metres.
for more information about this species go to one of the links below
OPK - Opistobranquis
nudibranchs of the british isles
sea slug forum