HomeFish encyclopediaRay-finned fishesKnifefishesGhost knifefishesMormyrus tube-snouted ghost knifefish Mormyrus tube-snouted ghost knifefish (Sternarchorhynchus mormyrus) Scientific name: Sternarchorhynchus mormyrus Steindachner, 1868 The Mormyrus tube-snouted ghost knifefish (Sternarchorhynchus mormyrus) is a freshwater fish of the family Apteronotidae. BiologyJuveniles were observed to live within v?rzea along the shores of the main river, whereas adults are inhabitants of main river channels.Source: FishBase, licensed CC BY-NC 4.0. Species factsScientific nameSternarchorhynchus mormyrusFamilyApteronotidae (Ghost knifefishes)OrderGymnotiformes (Knifefishes)ClassActinopterygii (Ray-finned fishes)Maximum length54.0EnvironmentFreshwater; benthopelagicClimateTropicalDistributionSouth America: mainstream of the Amazon River from Manaus in the central portions of the basin to the vicinity of Iquitos in north-eastern Peru, the R?o Negro, and from the R?o Orinoco basin in both Venezuela and south-eastern Colombia.Conservation status (IUCN)Least Concern (LC)Threat 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