HomeFish encyclopediaRay-finned fishesSilversidesSilversidesSmallscale hardyhead Smallscale hardyhead (Atherinason hepsetoides) Scientific name: Atherinason hepsetoides Richardson, 1843 The Smallscale hardyhead (Atherinason hepsetoides) is a marine fish of the family Atherinidae. Native range: Eastern Indian Ocean, endemic to southern Australia. BiologyDorsal spines (total): 6 - 11; Dorsal soft rays (total): 9-13; Anal spines: 1; Anal soft rays: 11 - 14. Body slightly compressed and sides flattened.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameAtherinason hepsetoidesFamilyAtherinidae (Silversides)OrderAtheriniformes (Silversides)ClassActinopterygii (Ray-finned fishes)Maximum length9.0Depth range1–30 m (3–98 ft)EnvironmentMarine; pelagic-neritic; depth range 1 - 30 m, usually 1 - 4 mClimateTemperateDistributionEastern Indian Ocean: endemic to southern Australia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessResilienceHigh, 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