HomeFreshwater aquarium fishTetras & characinsBuenos Aires tetra Buenos Aires tetra (Hyphessobrycon anisitsi) Scientific name: Hyphessobrycon anisitsi Eigenmann, 1907 The Buenos Aires tetra (Hyphessobrycon anisitsi) is a freshwater fish of the family Characidae that grows to about 8 cm (3.1 in). It is aggressive and needs water at 17–28°C (63–82°F) and a pH of 5.5–7.0. Native range: South America, Paran? and Uruguay River basins. Buenos Aires tetra care at a glanceTemperamentAggressiveAdult size8 cm (3.1 in)Temperature17–28°C (63–82°F)pH5.5–7.0Hardness5–20 dGH (89–357 ppm)DietOmnivore. Accepts live foods. BiologyOccurs in ponds. Feeds on worms, crustaceans, insects and plants. Oviparous. In captivity, spawning occurs among plants and eggs hatch usually in 20 to 24 hours. One of the hardiest tropical fishes for the home aquarium. Aquarium keeping: eats plants; in groups of 5 or more individuals; minimum aquarium size 80 cm.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameHyphessobrycon anisitsiFamilyCharacidae (Characins)OrderCharaciformes (Characins)ClassActinopterygii (Ray-finned fishes)Maximum length6.0EnvironmentFreshwater; benthopelagicClimateSubtropicalDistributionSouth America: Paran? and Uruguay River basins.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: highly commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More tetras & characinsBucktooth tetraExodon paradoxusNiger tetraArnoldichthys spilopterusSierra leone dwarf characinLadigesia roloffiJellybean tetraLepidarchus adonisOneline tetraNannaethiops unitaeniatusNeolebias ansorgiiSee 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