Cladosiphon contortus
- kingdom: Chromista
- phylum: Ochrophyta
- class: Phaeophyceae
- order: Ectocarpales
- family: Chordariaceae
- genus: Cladosiphon
- species: Cladosiphon contortus
Bognor Regis- Weymouth
England- Coylton
Scotland
United Kingdom