HomeFreshwater aquarium fishTetras & characinsHalfline hemiodus Halfline hemiodus (Hemiodus semitaeniatus) Scientific name: Hemiodus semitaeniatus Kner, 1858 The Halfline hemiodus (Hemiodus semitaeniatus) is a freshwater fish of the family Hemiodontidae. Native range: South America, Tapaj?s, Madeira, Capim, Essequibo, Orinoco, and Paran? River basins. Species factsScientific nameHemiodus semitaeniatusFamilyHemiodontidae (Halftooths)OrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length20.0EnvironmentFreshwater; benthopelagicClimateTropicalDistributionSouth America: Tapaj?s, Madeira, Capim, Essequibo, Orinoco, and Paran? River basins.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; aquarium: commercial More tetras & characinsSilver prochilodusSemaprochilodus taeniurusNannostomus marginatusSilver dollarMetynnis hypsauchenRedhook myleusMyloplus rubripinnisDarter characinCharacidium fasciatumRedflank bloodfinAphyocharax rathbuniSee all tetras & characins SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026