HomeFish encyclopediaRay-finned fishesPerch-like fishGobiesSlender eel goby Slender eel goby (Taenioides gracilis) Scientific name: Taenioides gracilis Valenciennes, 1837 The Slender eel goby (Taenioides gracilis) is a freshwater fish of the family Gobiidae. Native range: Africa, Madagascar. Asia: India to the Philippines. BiologyVertebrae: 29. Without scales; dorsal and anal fins completely joined to caudal fin; vertical fins without black edges; no postsymphyseal canine teeth in lower jaw.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameTaenioides gracilisFamilyGobiidae (Gobies)OrderPerciformes (Perch-like fish)ClassActinopterygii (Ray-finned fishes)Maximum length30.0EnvironmentFreshwater; brackish; demersalClimateTropicalDistributionAfrica: Madagascar. Asia: India to the Philippines.Conservation status (IUCN)Not EvaluatedThreat to humansHarmlessUsesFisheries: commercialResilienceMedium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.) SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026