Description: Rare. Thallus appearing as small spots up to 4 mm in diameter with a monostromatic base giving rise to short erect filaments, sometimes branched, up to about 10 cells long.

Habitat: Epiphytic on various algae in littoral pools and the sublittoral to 5 m.

Distribution: North-western distribution in the British Isles. Europe: France, Spain, Baltic Sea, Sweden, Norway, Faroes and Iceland. Greenland. Atlantic coast of North America: Canada and the U.S.A.

Similar Species: There are a number of similar species growing as epiphytes and all difficult to identify.

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

iNaturalist: Microspongium globosum at iNaturalist World Species Observations database.

WoRMS: Microspongium globosum at World Register of Marine Species. Accepted name: Microspongium globosum Reinke, 1888. AphiaID: 144973.

Classification: Biota; Chromista; Harosa; Heterokonta; Ochrophyta; Phaeophyceae; Fucophycidae; Ectocarpales; Chordariaceae; Microspongium