Pterosiphonia robusta
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Rhodomelaceae
- genus: Pterosiphonia
- species: Pterosiphonia robusta
Marin City- Sausalito
California
United States
Pterosiphonia robusta Marin City Sausalito