CHLOROPHYTA : Ulotrichales : UlotrichaceaeGREEN ALGAE

Ulothrix subflaccida Wille


Description: Fine filamentous species, unbranched.

Habitat: Littoral and sublittoral. Also recorded from some inland sites.

Distribution: Widespread in the British Isles. Greenland. Atlantic coast of Europe including Netherlands.

Similar Species: Easily confused with other species microscopic species of Ulothrix.

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

iNaturalist: Ulothrix subflaccida at iNaturalist World Species Observations database.

WoRMS: Ulothrix subflaccida at World Register of Marine Species.

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 Morton, O., Keatley, L., Morrow, C.C. & Picton, B.E. (2026). Ulothrix subflaccida. Wille. [In] Encyclopedia of Marine Life of Britain and Ireland.
https://habitas.org/mbdp/species.php?item=ZS550. Accessed on 2026-11-01