Gracilaria isabellana
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Gracilariales
- family: Gracilariaceae
- genus: Gracilaria
- species: Gracilaria isabellana
Puerto Limón
Limón
Costa RicaPort Royal
Kingston
JamaicaLamboglia
Patillas
Puerto RicoAtlantic Beach
Inwood
Lawrence
New York
United StatesSaint Croix
Saint Croix IslandCharlotte Amalie
Saint Thomas Island
Virgin Islands, U.S.