Description: Thin sheets, up to 4cm (maybe more) across. Greyish yellow. Soft, somewhat fragile, but not friable. Oscules more or less level with the surface; small. Osculiferous processes may sometimes occur.

Habitat: Possibly confined to the intertidal zone, under boulders.

Distribution: Recently known from Southern Ireland, Anglesey.

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

iNaturalist: Haliclona rava at iNaturalist World Species Observations database.