HomeFish encyclopediaRay-finned fishesKnifefishesGhost knifefishesSeveri?s tube-snouted ghost knifefish Severi?s tube-snouted ghost knifefish (Sternarchorhynchus severii) Scientific name: Sternarchorhynchus severii de Santana & Nogueira, 2006 The Severi?s tube-snouted ghost knifefish (Sternarchorhynchus severii) is a freshwater fish of the family Apteronotidae. Native range: South America, Brazil. BiologySpecimens were collected in an area characterized by steep banks and a shoreline bordered by dense forest; large amounts of aquatic plants (Family Podostemonacease) were present in the river, with the water being acidic (pH 5.8) and well oxygenated (91% saturation).Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSternarchorhynchus severiiFamilyApteronotidae (Ghost knifefishes)OrderGymnotiformes (Knifefishes)ClassActinopterygii (Ray-finned fishes)Maximum length16.9EnvironmentFreshwater; benthopelagicClimateTropicalDistributionSouth America: Brazil.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