Description: Polysiphonous filamentous, finely tufted to 15 cms long with widely spreading branches, opposite or alternate.

Habitat: Not uncommon in the mid littoral to 15 m.

Distribution: Records scattered on western shores of the British Isles. Europe: France, Baltic Sea, Norway, Faroes, Spitzbergen and Iceland. Greenland. Atlantic coast of North America: Canada and Maine. Alaska to California in the Pacific.

Similar Species: Other species of Stictyosiphon.

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

iNaturalist: Stictyosiphon tortilis at iNaturalist World Species Observations database.

GBIF data for Stictyosiphon tortilis

WoRMS: Stictyosiphon tortilis at World Register of Marine Species. Accepted name: Stictyosiphon tortilis (Gobi) Areschoug ex Reinke, 1889. AphiaID: 145355.

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