HomeFish encyclopediaRay-finned fishesSilversidesSilversidesHardhead silverside Hardhead silverside (Atherinomorus stipes) Scientific name: Atherinomorus stipes M?ller & Troschel, 1848 The Hardhead silverside (Atherinomorus stipes) is a freshwater fish of the family Atherinidae. Native range: Western Atlantic, southern Florida (USA), Bahamas, and Yucatan, Mexico to Brazil. Southeast Pacific: known only from Tumaco, Colombia. BiologyDorsal spines (total): 10 - 11; Dorsal soft rays (total): 8-10; Anal soft rays: 9 - 13. Head wider than body.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAtherinomorus stipesFamilyAtherinidae (Silversides)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)Maximum length10.0Common length7.5EnvironmentMarine; freshwater; brackish; reef-associatedClimateSubtropicalDistributionWestern Atlantic: southern Florida (USA), Bahamas, and Yucatan, Mexico to Brazil. Southeast Pacific: known only from Tumaco, Colombia.Conservation status (IUCN)Least Concern (LC)Threat to humansHarmlessUsesFisheries: minor commercial; bait: usuallyResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026