fish
inverts
   arthropods
   cnidaria
   crustacea
     Anomopoda
     argulus
     crabs
     crayfish
       Barbicambarus
       Cambarellus
       Cambarus
         englishi
         scotti
       Cherax
       Euastacus
       Hobbseus
       Lacunicambarus
       Pacifastacus
       Procambarus
     cyclops
     fairy shrimp
     gammarus
     mutations
     ostracod
     shrimp
     triops
   gastropods
   molluscs
   porifera
   protists
   worms
plants
misc