Eubranchus pallidus (Alder & Hancock, 1842)

29 March, 2015.
Glas Eilean, Loch Fyne on the west coast .
25 mm specimen on hydroid at 16 metres. One of several seen with spawn.
Water temperature 7°C.
Sony ?6000  in Nauticam housing, 50 mm Zeiss lens and Sola 1200 video light.