Sargassum natans
- kingdom: Chromista
- phylum: Ochrophyta
- class: Phaeophyceae
- order: Fucales
- family: Sargassaceae
- genus: Sargassum
- species: Sargassum natans
Hamilton
Hamilton city
BermudaPort Antonio
Portland
JamaicaCulebra
CulebraPunta Santiago
HumacaoLa Parguera
LajasCentral Aguirre
SalinasSan Juan
San Juan
Puerto RicoPeterlee
England
United KingdomEast Falmouth
MassachusettsHampton Bays
New YorkAtlantic Beach
North CarolinaSullivans Island
South Carolina
United States