HomeFreshwater aquarium fishGouramis & bettasHowong betta Howong betta (Betta unimaculata) Scientific name: Betta unimaculata Popta, 1905 The Howong betta (Betta unimaculata) is a freshwater fish of the family Osphronemidae. In the aquarium it needs water at 21–25°C (70–77°F). Native range: Asia, known only from upper Kayan (=Kajan) and Howong drainages in east Borneo, Indonesia. Howong betta care at a glanceTemperature21–25°C (70–77°F) Species factsScientific nameBetta unimaculataFamilyOsphronemidae (Gouramies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length12.6EnvironmentFreshwater;; pH range: 6.5 - 7.5; dH range: 10 - 20 benthopelagicClimateTropicalDistributionAsia: known only from upper Kayan (=Kajan) and Howong drainages in east Borneo, Indonesia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More gouramis & bettasPseudosphromenus dayiGiant gouramiOsphronemus goramyRoundtail paradisefishMacropodus opercularisSiamese fighting fishBetta splendensCroaking gouramiTrichopsis vittataLuciocephalus auraSee all gouramis & bettas SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026