HomeFish encyclopediaRay-finned fishesKnifefishesGhost knifefishesMarrero?s tube-snouted ghost knifefish Marrero?s tube-snouted ghost knifefish (Sternarchorhynchus marreroi) Scientific name: Sternarchorhynchus marreroi de Santana & Vari, 2010 The Marrero?s tube-snouted ghost knifefish (Sternarchorhynchus marreroi) is a freshwater fish of the family Apteronotidae. Native range: South America, central and delta regions of the R?o Orinoco, Venezuela. Species factsScientific nameSternarchorhynchus marreroiFamilyApteronotidae (Ghost knifefishes)OrderGymnotiformes (Knifefishes)ClassActinopterygii (Ray-finned fishes)Maximum length27.8EnvironmentFreshwater; benthopelagicClimateTropicalDistributionSouth America: central and delta regions of the R?o Orinoco, Venezuela.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