#snapping_turtle  large aggressive freshwater turtle with powerful jaws
  supertype:  turtle  any of various aquatic and land reptiles having a bony shell and flipper-like limbs for swimming
  member of:  family_Chelydridae
  subtype:  common_snapping_turtle__snapper__chelydraserpentina  large-headed turtle with powerful hooked jaws found in or near water; prone to bite
  subtype:  alligator_snapping_turtle__alligator_snapper__alligatorsnapper__Macroclemys_temmincki  large species having three ridges on its back; found in southeastern United States

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