Description: Slimy sheets up to 4cm x 5cm, or slimy cushions generally surmounted by a short, narrow oscular chimney. Ochraceous yellow, greyish, yellowish or creamy fawn. Fairly firm and elastic. Oscules are sparsely distributed, frequently at the ends of short, cylindrical chimneys. Normally 1 - 2mm wide.

Distribution: Atlantic coasts of Europe; Mediterranean; etc.

Distribution Map from NBN: Halisarca dujardinii at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Halisarca dujardinii at iNaturalist World Species Observations database.

WoRMS: Halisarca dujardinii at World Register of Marine Species.