fish
   Anabantiformes
   Anguilliformes
   Atheriniformes
   Characiformes
   Cichlidae
   Cypriniformes
   Cyprinodontiformes
   Gobiiformes
   Perciformes
   Siluriformes
   more
     Acipenseriformes
     Ambassidae
     Amiidae
     Arapaimidae
     Batrachoididae
     Beloniformes
     Blenniidae
     Centrarchiformes
     Dipnoi
     Engraulidae
     Esociformes
     Galaxioidea
     Gasterosteidae
     Gonorynchiformes
     Gymnotiformes
     Indostomas
     Lepisosteiformes
     Lobotiformes
     Mormyridae
     Mugilidae
     Ophidiiformes
       Bythitoidei
       Ophidioidei
         Carapidae
         Ophidiidae
           Brotulinae
           Brotulotaeniinae
           Neobythitinae
             Abyssobrotula
             Acanthonus
             Alcockia
             Apagesoma
             Barathrites
             Barathrodemus
             Bassogigas
             Bassozetus
             Bathyonus
             Benthocometes
             Dannevigia
             Dicrolene
             Enchelybrotula
             Epetriodus
             Eretmichthys
             Glyptophidium
             Holcomycteronus
             Homostolus
             Hoplobrotula
             Hypopleuron
             Lamprogrammus
             Leptobrotula
             Leucicorus
             Luciobrotula
             Mastigopterus
             Menziesichthys
             Monomitopus
             Neobythites
             Penopus
             Petrotyx
             Porogadus
             Pycnocraspedum
             Selachophidium
             Sirembo
             Spectrunculus
             Spottobrotula
             Tauredophidium
             Typhlonus
             Xyelacyba
           Ophidiinae
     cave
     Osteoglossidae
     Pantodontidae
     Percopsiformes
     Pleuronectiformes
     Polycentridae
     Polypteridae
     Potamotrygonidae
     Scatophagidae
     Scorpaeniformes
     Syngnathidae
     Tarumaniidae
   Synbranchiformes
inverts
plants
misc