fish
   Anabantiformes
   Anguilliformes
   Atheriniformes
   Characiformes
   Cichlidae
   Cypriniformes
   Cyprinodontiformes
   Gobiiformes
   Perciformes
   Siluriformes
   Synbranchiformes
   more
     Ambassidae
     Amiidae
     Arapaimidae
     Batrachoididae
     Beloniformes
     Blenniidae
     Centrarchiformes
     Dipnoi
     Engraulidae
     Esociformes
     Galaxioidea
     Gasterosteidae
     Gonorynchiformes
     Gymnotiformes
       Apteronotidae
       Gymnotidae
         Electrophorinae
         Gymnotinae
           Gymnotus
             Gymnotus
               adilai
               araoaima
               bahianus
               capanema
               carapo
               chaviro
               chimarrao
               choco
               cuai
               curupira
               diamantinensis
               eyra
               interruptus
               mamiraua
               obscurus
               omarorum
               pantanal
               pedanopterus
               riberalta
               sylvius
               ucamara
               varzea
             Lamontianus
             Pantherus
             Tigrinus
             Tijax
       Hypopomidae
       Notopteridae
       Rhamphichthyidae
       Sternopygidae
     Indostomas
     Lepisosteiformes
     Lobotiformes
     Mormyridae
     Mugilidae
     Ophidiiformes
     Osteoglossidae
     Pantodontidae
     Percopsiformes
     Pleuronectiformes
     Polycentridae
     Polypteridae
     Potamotrygonidae
     Scatophagidae
     Scorpaeniformes
     Syngnathidae
     Tarumaniidae
     cave
inverts
plants
misc