fish
inverts
   Arthropoda
     Arachnida
     crustacea
       altocrustacea
         branchiopoda
           diplostraca
             anomopoda
             laevicaudata
             onychocaudata
               Cladoceromorpha
               Spinicaudata
           Notostraca
         copepoda
         Malacostraca
       argulus
       crabs
       crayfish
       fairy shrimp
       mutations
       ostrocoda
       shrimp
     insecta
   bacteria
   cnidaria
   colonial
   gastropods
   molluscs
   protists
   worms
misc
plants