HomeFreshwater aquarium fishGouramis & bettasCeylonese combtail Ceylonese combtail (Belontia signata) Scientific name: Belontia signata G?nther, 1861 The Ceylonese combtail (Belontia signata) is a freshwater fish of the family Osphronemidae that grows to about 18 cm (7.1 in). It is easy to keep and aggressive, is best kept in a species tank and needs a tank of at least 210 L (55 US gal), water at 23–27°C (73–81°F) and a pH of 6.0–7.5. Native range: Asia, Still waters of Sri Lanka. Ceylonese combtail care at a glanceCare levelEasyTemperamentAggressiveCommunity tankNot suitableAdult size18 cm (7.1 in)Minimum tank210 L (55 US gal)Temperature23–27°C (73–81°F)pH6.0–7.5Hardness2–15 dGH (36–268 ppm)DietOmnivore. Accepts flakes, frozen foods and live foods. BiologyInhabits usually slow-flowing, shallow, clear water streams, usually with a pebble or sand substrate. Territorial, usually solitary, juveniles form small schools of 3-5 individuals. Feeds on terrestrial insects and detritus.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameBelontia signataFamilyOsphronemidae (Gouramies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length18.0Common length10.0Depth range0–1 m (0–3 ft)EnvironmentFreshwater; benthopelagic; depth range 0 - 1 mClimateTropicalDistributionAsia: common in the south west quarter and mid-hill region of the Mahaweli basin, including the lower hills up to about 800 m. Found throughout Kelani and Kalu River basins, Sri Lanka.Conservation status (IUCN)Lower Risk: conservation dependent (LR/cd)Threat to humansHarmlessUsesFisheries: of no interest; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More gouramis & bettasBetta rajaLuciocephalus auraPseudosphromenus dayiGiant gouramiOsphronemus goramyRoundtail paradisefishMacropodus opercularisSiamese fighting fishBetta splendensSee all gouramis & bettas 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