11. Gymnotiformes: Knifefishes of the New World (24)

  • Gymnotus stenoleucus

    11. July 2019

    The knifefishes of the genus Gymnotus are the most attractive knifefishes at all – at least in respect of the coloration. They are so to say small Electric Eels. However, the electric impulses produced by Gymnotus are much weaker. They are used only for communication and for orientation and can be compared with the echolocation […]

  • Gymnotus chaviro

    22. June 2018

    More and more species of Gymnotus become known to science. Gymnotus chaviro originates from Peru. Here it inhabits the basin of the upper Rio Jurua. The species is found together with its close relative G. carapo. The pattern of G. chaviro is species-specific. However, there is one usefull feature mentioned in the original description: the […]

  • Sternarchogiton preto

    29. January 2018

    Most probably this importation of this black knifefish from Peru („preto“ means „black“) is the first one to Europe. At least the pictures of a life specimen we post here are the only ones we know about. The uniform black coloration is a good feature to distinguish the species from other members of the genus […]

  • Gymnotus stenoleucus

    15. September 2017

    The knifefishes of the genus Gymnotus are the most attractive knifefishes at all – at least in respect of the coloration. They are so to say small Electric Eels. However, the electric impulses produced by Gymnotus are much weaker. They are used only for communication and for orientation and can be compared with the echolocation […]

  • Apteronotus albifrons WHITE

    17. July 2017

    The Black Ghost (Apteronotus albifrons) is a most beautiful and elegant knifefish from South America. The species has a very wide distribution, wild collected specimens most often come from the Orinoco (Colombia and Venezuela). However, the up to 50 cm long species is also bred since many years in Indonesia on a regular basis. The […]

  • How to pack 600 Volts!

    13. February 2017

    The Electric Eel, Electrophorus electricus, has the strongest electric discharges of all known electric species of fish (electric catfish, electric rays, elephant fishes, knifefishes). Up to 600 Volts are quite common, very large specimens may produce even stronger discharges. The Electric Eel is no eel at all, but belongs to the New World Knifefishes. Five […]

  • Gymnotus carapo

    19. July 2016

    The number of scientifically described species in the genus Gymnotus increases rapidly recently. Since the last complete revision of the New World Knifefishes by Francisco Mago-Leccia in 1994 30 new species have been described, raising the total number of known species to 39. Members of the genus Gymnotus are cylindrical shaped and most often they […]

  • Apteronotus albifrons WHITE

    12. July 2016

    The Black Ghost (Apteronotus albifrons) is a most beautiful and elegant knifefish from South America. The species has a very wide distribution, wild collected specimens most often come from the Orinoco (Colombia and Venezuela). However, the up to 50 cm long species is also bred since many years in Indonesia on a regular basis. The […]

  • Gymnotus stenoleucus

    12. October 2015

    The knifefishes of the genus Gymnotus are the most attractive knifefishes at all – at least in respect of the coloration. They are so to say small Electric Eels. However, the electric impulses produced by Gymnotus are much weaker. They are used only for communication and for orientation and can be compared with the echolocation […]

  • Rhamphichthys hahni

    Rhamphichthys hahni

    26. May 2015

    Yesterday we received for the first time ever an extremely unusual species of knifefish from Paraguay: Rhamphichthys hahni. We obtained three specimens of about 20-30 cm length. Despite the fact that the species has been described in the year 1937 already it has been overlooked by most of the following scientists. The photos posted here […]