HomeFish encyclopediaRay-finned fishesHerringsHerrings, shads and sardinesAtlantic thread herring Atlantic thread herring (Opisthonema oglinum) Scientific name: Opisthonema oglinum Lesueur, 1818 The Atlantic thread herring (Opisthonema oglinum) is a marine fish of the family Clupeidae. BiologyInhabit harbors and shallow coastal areas. Form schools (but solitary individuals reported), probably not entering water of low salinity. Feed by filtering plankton (copepods), but also take small fishes, crabs and shrimps. Marketed fresh, frozen and salted; also used in the fishmeal industry. Occur in freshwater in St. Johns River, Florida.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameOpisthonema oglinumFamilyClupeidae (Herrings, shads and sardines)OrderClupeiformes (Herrings)ClassActinopterygii (Ray-finned fishes)Maximum length38.0Common length20.0Depth range5 m (16 ft)EnvironmentMarine; reef-associated; depth range 5 - ? mClimateTropicalDistributionWestern Atlantic: Gulf of Maine (USA), Bermuda, throughout the Gulf of Mexico, Caribbean and West Indies southward to Santa Catarina, Brazil. The Colombian form is possibly a subspecies, Opisthonema oglinum captivai. Also found in Uruguay and Argentina.Conservation status (IUCN)Not EvaluatedThreat to humansReports of ciguatera poisoningUsesFisheries: commercial; bait: usuallyResilienceMedium, minimum population doubling time 1.4 - 4.4 years (tm=1-3; tmax=8) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026