Polysiphonia tsudana
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Rhodomelaceae
- genus: Polysiphonia
- species: Polysiphonia tsudana
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Faleāsao
Manu'a
American Samoa -
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Kaunakakai
Hawaii
United States -