curve

fish
inverts
plants
misc
   about
   biotope
     creek
       africa
       australia
       china
       killifish
       new guinea
       peru
         nanay
       thailand
     lake
     marsh
     oasis
     pond
     river
     shoreline
   food
   gear
   library
   other
   people
   sci
   stores
   styles
   tanks
   vet

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