#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
  supertype:  shark  any of numerous elongate mostly marine carnivorous fishes with heterocercal caudal fins and tough skin covered with small toothlike scales
  member of:  genus_Sphyrna
  subtype:  smooth_hammerhead__Sphyrna_zygaena  fished for the hides and vitamin-rich liver
  subtype:  smalleye_hammerhead__Sphyrna_tudes  fished for the hide and vitamin-rich liver
  subtype:  shovelhead__bonnethead__bonnet_shark__Sphyrna_tiburo  small harmless hammerhead having a spade-shaped head; abundant in bays and estuaries

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