fish
inverts
   Arthropoda
     Arachnida
     crustacea
       altocrustacea
         branchiopoda
         copepoda
         Malacostraca
           Amphipoda
             Gammaridae
               Gammarus
       argulus
       crabs
       crayfish
       fairy shrimp
       mutations
       ostrocoda
       shrimp
     insecta
   bacteria
   cnidaria
   colonial
   gastropods
   molluscs
   protists
   worms
misc
plants