Atlantic Threadfin
Polydactylus octonemus
- Least concern
- Card rarity: Common
- Fish

The Atlantic threadfin is a species of ray-finned fish, a threadfin from the family Polynemidae native to subtropical and temperate waters of the western Atlantic Ocean and the Gulf of Mexico.
Classification
- Class
- Actinopterygii
- Order
- Carangiformes
- Family
- Polynemidae
- Genus
- Polydactylus