Janolus hyalinus (Alder & Hancock, 1854)
Author & date of last revision: Ian Smith on 5 August 2012
Antiopella hyalina; Antiopa hyalinus Alder & Hancock, 1854;
Body (excluding appendages)
Key identification features
Ecology and behaviour
Most records sublittoral, on or near its erect bryozoans prey; species of Bugula (EML) and Scrupocellaria (UWN). When contracted, resembles a sea anemone . Both in extreme exposure (e.g. St Kilda) and extreme shelter (e.g. Lough Hyne). A relatively agile species with near neutral buoyancy, so very occasionally drifts on shore where it may be found in pools or in shallow water. Simultaneous hermaphrodite. Spawn a coiling line of white ovoids, each of which contains many ova , recorded September in wild, and May in refrigerator at 9° C.