Description: Unicellular, cells aggregrate in mucilaginous masses. Bright green in colour.

Habitat: Saltmarsh mud, has not been found in sea water in the British Isles.

Distribution: England: Norfolk. Europe: Denmark, Baltic,

Similar Species: Porphyridium purpureum (Bory) Drew et Ross.

Key Identification Features:

• Unicellular, bright green.

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

iNaturalist: Porphyridium aerugineum at iNaturalist World Species Observations database.

WoRMS: Porphyridium aerugineum at World Register of Marine Species.