Udotea flabellum
- kingdom: Plantae
- phylum: Chlorophyta
- class: Ulvophyceae
- order: Bryopsidales
- family: Udoteaceae
- genus: Udotea
- species: Udotea flabellum
- Colonel Hill
Crooked Island and Long Cay- Nassau
New Providence- Duncan Town
Ragged Island
Bahamas- Bridgetown
Saint Michael
Barbados- Hamilton
Hamilton city- Saint George
Saint George
Bermuda- Santa Maria
Sal
Cape Verde- Alamar
Havana
Cuba- Boca de Yuma
La Altagracia
Dominican Republic- Sandy Bay
Bay Islands
Honduras- Port Royal
Kingston- Port Antonio
Portland- Duncans
Trelawny
Jamaica- Puerto Real
Cabo Rojo- Culebra
Culebra- Fuig
- Guánica
- Maria Antonia
Guanica- Guayanilla
- Indios
- Magas Arriba
Guayanilla- Rafael Capo
- Rafael Gonzalez
Hatillo- Punta Santiago
Humacao- La Parguera
Lajas- Luquillo
Luquillo- Tallaboa
Penuelas- Central Aguirre
Salinas
Puerto Rico- Key West
- Lake Clarke Shores
- Lake Worth
Florida
United States- Saint Croix
Saint Croix Island- Cruz Bay
Saint John Island
Virgin Islands, U.S.