#genus_Sphyrna__Sphyrna  type genus of the Sphyrnidae
  supertype:  fish_genus  any of various genus of fish
  member of:  family_Sphyrnidae
  member:  hammerhead_shark__hammerhead  medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous

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