#flipper  the flat broad limb of aquatic animals specialized for swimming
  supertype:  limb  one of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper
  part of:  aquatic_vertebrate__aquaticvertebrate  animal living wholly or chiefly in or on water
  part of:  aquatic_mammal__aquaticmammal  whales and dolphins; manatees and dugongs; walruses; seals

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