HomeFish encyclopediaRay-finned fishesKnifefishesGhost knifefishesMendes? tube-snouted ghost knifefish Mendes? tube-snouted ghost knifefish (Sternarchorhynchus mendesi) Scientific name: Sternarchorhynchus mendesi de Santana & Vari, 2010 The Mendes? tube-snouted ghost knifefish (Sternarchorhynchus mendesi) is a freshwater fish of the family Apteronotidae. Native range: South America, known only from the R?o San Juan and R?o Guanipa basins of north-eastern Venezuela, both drain into the Golfo de Paria. Species factsScientific nameSternarchorhynchus mendesiFamilyApteronotidae (Ghost knifefishes)OrderGymnotiformes (Knifefishes)ClassActinopterygii (Ray-finned fishes)Maximum length19.2EnvironmentFreshwater; benthopelagicClimateTropicalDistributionSouth America: known only from the R?o San Juan and R?o Guanipa basins of north-eastern Venezuela, both drain into the Golfo de Paria.Conservation status (IUCN)Not EvaluatedThreat to humansHarmless SourcesTaxonomy, distribution and biology data: FishBase (Froese, R. and D. Pauly, eds.), licensed CC BY-NC 4.0.Last updated 27 September 2026