Coelarthrum cliftonii
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Rhodymeniales
- family: Rhodymeniaceae
- genus: Coelarthrum
- species: Coelarthrum cliftonii
Saint George
Saint George
Bermuda
Guánica
Guanica
Puerto Rico
Hau‘ula
Hawaii
United States