Gracilaria millardetii
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Gracilariales
- family: Gracilariaceae
- genus: Gracilaria
- species: Gracilaria millardetii
Petite Rivière
Black River- Quatre Soeurs
Flacq- Grand Sable
Grand Port- Ebene
Plaines Wilhems
Mauritius