HomeFish encyclopediaRay-finned fishesPerch-like fishThreadfinsAtlantic threadfin Atlantic threadfin (Polydactylus octonemus) Scientific name: Polydactylus octonemus Girard, 1858 The Atlantic threadfin (Polydactylus octonemus) is a marine fish of the family Polynemidae. BiologyOccurs on sand or mud bottoms and on beaches, especially on the surf.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific namePolydactylus octonemusFamilyPolynemidae (Threadfins)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length33.0Common length25.0Depth range5–66 m (16–217 ft)EnvironmentMarine; demersal; depth range 5 - 66 m, usually 5 - 16 mClimateSubtropicalDistributionWestern Atlantic: New York and along the coast to the western coast of Yucat?n, Mexico. Some authors report this species as occurring throughout northern South America.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercialResilienceHigh, minimum population doubling time less than 15 months (tm SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026