Polysiphonia echinata
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Rhodomelaceae
- genus: Polysiphonia
- species: Polysiphonia echinata
Cudjoe Key- Key West
Florida
United States
Polysiphonia echinata Cudjoe Key Key West