Description: Fronds erect to 20 cms long, filiform and gelatinous. Periferal filaments dense.

Habitat: Rare. Epipytic on Zostera.

Distribution: Western distribution in the British Isles, south of England, western Scotland and west Ireland also Channel Islands. Europe: France and the Baltic. Further afield: Canary Islands.

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

iNaturalist: Cladosiphon zosterae at iNaturalist World Species Observations database.

WoRMS: Cladosiphon zosterae at World Register of Marine Species. Accepted name: Cladosiphon zosterae (J.Agardh) Kylin, 1940. AphiaID: 144916.

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