fish
   Anabantiformes
   Anguilliformes
   Atheriniformes
   Characiformes
   Cichlidae
   Cypriniformes
   Cyprinodontiformes
     Aplocheiloidei
       Aplocheilidae
         Aplocheilus
         Pachypanchax
           ANL
           NUC
           OMO
           PLA
           PTC
           SAK
           SPK
           VRT
           breeding
           care
           evolution
       Cynolebiidae
       Kenyaichthyidae
       Nothobranchiidae
     Cyprinodontoidei
     Poeciliidae
   Gobiiformes
   Perciformes
   Siluriformes
   Synbranchiformes
   more
inverts
plants
misc