Gymnotus onca

Taxonomy of Fishes

• Osteichthyes - Bony fishes->

  • Coelacanthi - Lobe-finned fishes->
  • Teleostei - Ray-finned fishes->

    • Perciformes - Perches->
    • Cypriniformes - Carps->
    • Esociformes - Pikes->
    • Salmoniformes - Salmons and Trouts->
    • Siluriformes - Catfishes->
    • Scorpaeniformes - Mail-cheeked fishes->
    • Gasterosteiformes - Sticklebacks->
    • Gadiformes - Cods->
    • Anguilliformes - Eels and morays->
    • Clupeiformes - Herrings->
    • Syngnathiformes - Pipefishes and Seahorses->
    • Gobiiformes - Gobies->
    • Mugiliformes - Mullets->
    • Carangiformes - Jacks->
    • Beloniformes - Needlefishes->
    • Labriformes - Wrasses->
    • Scombriformes - Mackerels->
    • Mulliformes - Goatfishes->
    • Pleuronectiformes - Flatfishes->
    • Aulopiformes - Grinners->
    • Blenniiformes - Blennies->
    • Cyprinodontiformes - Toothcarps->
    • Osmeriformes - Smelts->
    • Centrarchiformes - Basses and sunfishes->
    • Cichliformes - Cichlids->
    • Characiformes - Characins->
    • Osteoglossiformes - Bony tongues->
    • Elopiformes - Tarpons and tenpounders->
    • Anabantiformes - Gouramies and snakeheads->
    • Gymnotiformes - South American knifefish->

      • Gymnotidae - Naked-back knifefishes->

        • Electrophorus - Electric eele->
        • Gymnotus - Gymnotus->

          • Gymnotus anguillaris (Gymnotus anguillaris)
          • Gymnotus arapaima (Gymnotus arapaima)
          • Gymnotus ardilai (Gymnotus ardilai)
          • Gymnotus bahianus (Gymnotus bahianus)
          • Gymnotus capanema (Gymnotus capanema)
          • Gymnotus capitimaculatus (Gymnotus capitimaculatus)
          • Banded knifefish (Gymnotus carapo)
          • Gymnotus cataniapo (Gymnotus cataniapo)
          • Gymnotus chaviro (Gymnotus chaviro)
          • Gymnotus chimarrao (Gymnotus chimarrao)
          • Gymnotus choco (Gymnotus choco)
          • Gymnotus coatesi (Gymnotus coatesi)
          • Gymnotus coropinae (Gymnotus coropinae)
          • Gymnotus cuia (Gymnotus cuia)
          • Gymnotus curupira (Gymnotus curupira)
          • Gymnotus cylindricus (Gymnotus cylindricus)
          • Gymnotus diamantinensis (Gymnotus diamantinensis)
          • Gymnotus esmeraldas (Gymnotus esmeraldas)
          • Gymnotus henni (Gymnotus henni)
          • Gymnotus inaequilabiatus (Gymnotus inaequilabiatus)
          • Gymnotus interruptus (Gymnotus interruptus)
          • Gymnotus javari (Gymnotus javari)
          • Gymnotus jonasi (Gymnotus jonasi)
          • Spotted knifefish (Gymnotus maculosus)
          • Gymnotus mamiraua (Gymnotus mamiraua)
          • Gymnotus melanopleura (Gymnotus melanopleura)
          • Gymnotus obscurus (Gymnotus obscurus)
          • Gymnotus omarorum (Gymnotus omarorum)
          • Gymnotus onca (Gymnotus onca)
          • Gymnotus panamensis (Gymnotus panamensis)
          • Gymnotus pantanal (Gymnotus pantanal)
          • Gymnotus pantherinus (Gymnotus pantherinus)
          • Gymnotus paraguensis (Gymnotus paraguensis)
          • Gymnotus pedanopterus (Gymnotus pedanopterus)
          • Gymnotus stenoleucus (Gymnotus stenoleucus)
          • Gymnotus sylvius (Gymnotus sylvius)
          • Gymnotus tigre (Gymnotus tigre)
          • Tiquie banded knifefish (Gymnotus tiquie)
          • Gymnotus ucamara (Gymnotus ucamara)
          • Gymnotus varzea (Gymnotus varzea)
      • Apteronotidae - Ghost knifefish->
      • Hypopomidae - Bluntnose knifefishes->
      • Rhamphichthyidae - Sand knifefishes->
      • Sternopygidae - Glass knifefishes->
    • Istiophoriformes - Barracudas->
    • Albuliformes - Bonefishes->
    • Lepidogalaxiiformes - Salamanderfishes->
    • Lophiiformes - Anglerfishes->
    • Spariformes - Breams and porgies->
    • Trachiniformes - Weeverfishes->
    • Moroniformes - Temperate basses->
    • Acanthuriformes - Surgeonfishes->
    • Zeiformes - Dories->
    • Tetraodontiformes - Puffers and filefishes->
    • Holocentriformes - Squirrelfishes->
    • Dactylopteriformes - Flying gurnards->
    • Lampriformes - Lamprids->
    • Galaxiiformes - Southern smelts->
    • Batrachoidiformes - Toadfishes->
    • Hiodontiformes - Mooneyes->
    • Percopsiformes - Trout-perches->
    • Callionymiformes - Dragonets->
    • Atheriniformes - Silversides->
    • Notacanthiformes - Spiny eels->
    • Saccopharyngiformes - Swallowers and Gulpers->
    • Alepocephaliformes - Slickheads and tubeshoulders->
    • Gonorynchiformes - Milkfishes->
    • Argentiniformes - Marine smelts->
    • Stomiiformes - Lightfishes and dragonfishes->
    • Ateleopodiformes - Jellynose fishes->
    • Myctophiformes - Lanternfishes->
    • Stylephoriformes - Tube-eyes->
    • Polymixiiformes - Beardfishes->
    • Beryciformes - Sawbellies->
    • Trachichthyiformes - Rughies->
    • Ophidiiformes - Cusk-eels->
    • Kurtiformes - Nurseryfishes & Cardinalfishes->
    • Synbranchiformes - Swamp eels->
    • Gobiesociformes - Clingfishes->
    • Acropomatiformes - Oceanic basses->
  • Cladistii - Bichirs->
  • Dipneusti - Lungfishes->
  • Chondrostei - Sturgeons->
  • Holostei - Gars and Bowfins->
• Chondrichthyes - Cartilaginous fishes->
• Agnatha - Jawless fishes->