Description: Microscopic unicellular epiphytic alga attached by a pedicel to other algae.

Habitat: Probablu not common. Littoral.

Distribution: Only once recorded from Ireland in Co. Down, others records from Britain in Berwickshire and Cumbrae. Europe: Sweden. Atlantic coast of North America: Canada. Further afield: in the Arctic Sea fron Spitzbergen.

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

iNaturalist: Characium marinum at iNaturalist World Species Observations database.

WoRMS: Characium marinum at World Register of Marine Species.