Description: Thallus a thin crust or cushion, small up to 1 mm diameter becoming globose.

Habitat: Very rare. Epiphytic on Zostera in the lower littoral and sublittoral.

Distribution: Generally of western distribution British Isles in England, Scotland, Ireland, Isle of Man and the Channel Isles. Europe:Atlantic coast of Spain, Baltic Sea and Norway. Atlantic coast of North America: from Newfoundland to Connecticut. Further afield: the Pacific.

Similar Species: There are many small crusts which are similar and not easy to identify. Rhodophysema feldmannii; Rhodophysema elegans.

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

iNaturalist: Rhodophysema georgii at iNaturalist World Species Observations database.

WoRMS: Rhodophysema georgii at World Register of Marine Species.