HomeFreshwater aquarium fishSharks & algae eatersSiamese flying fox Siamese flying fox (Crossocheilus oblongus) Scientific name: Crossocheilus oblongus Kuhl & Van Hasselt, 1823 The Siamese flying fox (Crossocheilus oblongus) is a freshwater fish of the family Cyprinidae. In the aquarium it needs water at 24–26°C (75–79°F). Native range: Asia, Thailand to Indonesia. Siamese flying fox care at a glanceTemperature24–26°C (75–79°F) BiologyVertebrae: 22 - 24. With broad lateral stripe along the body; lateral stripe extending onto middle rays of caudal fin; 8-9 predorsal scales; rostral barbels only; 2-3 scale rows between anus and anal fin origin.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameCrossocheilus oblongusFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length16.0EnvironmentFreshwater;; pH range: 6.5 - 8.0; dH range: 5 - 20 benthopelagicClimateTropicalDistributionAsia: Thailand to Indonesia.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesAquarium: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) More sharks & algae eatersBlack sharkminnowLabeo chrysophekadionChinese suckerMyxocyprinus asiaticusFlying foxEpalzeorhynchos kalopterusLuciosoma setigerumLuciosoma pellegriniiHoven's carpLeptobarbus hoeveniiSee all sharks & algae eaters SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026