fish
inverts
   Annelida
   Arthropoda
     Arachnida
     crustacea
       altocrustacea
         branchiopoda
           diplostraca
             laevicaudata
             onychocaudata
               Cladoceromorpha
                 bosminidae
                 cercopagididae
                 chydoridae
                 cyclestheriidae
                 daphniidae
                   ceriodaphnia
                   daphnia
                   daphniopsis
                   megafenestra
                   scapholeberis
                   simocephalus
                     congener
                     exspinosus
                     macrocopa
                     serrulatus
                     vetulus
                 holopediidae
                 ilyocryptidae
                 leptodoridae
                 macrothricidae
                 moinidae
                 podonidae
                 polyphemidae
                 sididae
               Spinicaudata
           Notostraca
         copepoda
         Malacostraca
       argulus
       crabs
       crayfish
       fairy shrimp
       mutations
       ostrocoda
       shrimp
     insecta
   Bacteria
   Cnidaria
   Mollusca
   Porifera
   Protozoa
misc
plants