HomeFreshwater aquarium fishBarbs, danios & rasborasMekong flying barb Mekong flying barb (Esomus longimanus) Scientific name: Esomus longimanus Lunel, 1881 The Mekong flying barb (Esomus longimanus) is a freshwater fish of the family Cyprinidae. BiologyDorsal soft rays (total): 8; Anal soft rays: 8. Two pairs of barbels; rostral barbel extends well beyond eye; first pectoral ray sometimes reaching anal fin; narrow dark line from head to caudal-fin base (Re. 12693).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameEsomus longimanusFamilyCyprinidae (Minnows or carps)OrderCypriniformes (Carps)ClassActinopterygii (Ray-finned fishes)Maximum length8.0EnvironmentFreshwater; benthopelagicClimateTropicalDistributionAsia: Mekong from the Khorat Plateau, Thailand to the Great Lake, Cambodia; Malay Peninsula, coastal streams of South-east Thailand and Cambodia, and Chao Phraya basin in Thailand.Conservation status (IUCN)Near Threatened (NT)Threat to humansHarmlessUsesFisheries: commercial; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More barbs, danios & rasborasLambchop rasboraTrigonostigma espeiGoldfishCarassius auratus auratusHypsibarbus wetmoreiDanio erythromicronBoraras brigittaeZebra danioDanio rerioSee all barbs, danios & rasboras SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026