HomeFreshwater aquarium fishTetras & characinsPayara Payara (Hydrolycus scomberoides) Scientific name: Hydrolycus scomberoides Cuvier, 1819 The Payara (Hydrolycus scomberoides) is a freshwater fish of the family Cynodontidae that grows to about 117 cm (46 in). It is difficult to keep and peaceful and needs a tank of at least 475 L (125 US gal), water at 24–28°C (75–82°F) and a pH of 6.0–8.0. Native range: South America, Amazon River basin. Payara care at a glanceCare levelDifficultTemperamentPeacefulAdult size117 cm (46 in)Minimum tank475 L (125 US gal)Temperature24–28°C (75–82°F)pH6.0–8.0Hardness8–15 dGH (143–268 ppm)DietCarnivore BiologyApparently carnivorous, probably ichthyophagous. Maximum length reported to reach 40 cm TL.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHydrolycus scomberoidesFamilyCynodontidae (Dogtooth characins)OrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length117EnvironmentFreshwater; benthopelagicClimateTropicalDistributionSouth America: Amazon River basin.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; gamefish: yes; aquarium: public aquariums More tetras & characinsBanded astyanaxAstyanax fasciatusCardinal tetraParacheirodon axelrodiHyphessobrycon columbianusBanded leporinusLeporinus fasciatusNeolebias ansorgiiOneline tetraNannaethiops unitaeniatusSee all tetras & characins SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0. Aquarium care parameters compiled, checked and converted to metric and imperial units by Guppies.za.net.Last updated 28 September 2026