HomeFreshwater aquarium fishOddballs & predatorsMalabar spinyeel Malabar spinyeel (Macrognathus guentheri) Scientific name: Macrognathus guentheri Day, 1865 The Malabar spinyeel (Macrognathus guentheri) is a freshwater fish of the family Mastacembelidae. Native range: Asia, India. Species factsScientific nameMacrognathus guentheriFamilyMastacembelidae (Spiny eels)OrderSynbranchiformes (Spiny eels)ClassActinopterygii (Ray-finned fishes)Maximum length26.0Common length20.0EnvironmentFreshwater; benthopelagicClimateTropicalDistributionAsia: India.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: minor commercial; aquarium: commercialResilienceHigh, minimum population doubling time less than 15 months (Preliminary K or Fecundity.) More oddballs & predatorsApteronotus leptorhynchusGlass knifefishEigenmannia virescensBlack ghostApteronotus albifronsEel LoachPangio anguillarisAmazon leaffishMonocirrhus polyacanthusGangetic leaffishNandus nandusSee all oddballs & predators SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026