Microchlamylla gracilis (Alder & Hancock, 1844)

7 April, 2018.
Barrisdale Narrows, Loch Hourne on the west coast .
15 mm animals at 14 metres with spawn nearby.
Water temperature 5°C.
Sony α6000  in Nauticam housing, 50 mm Zeiss lens and Sola 1200 video light.

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