#family_Carcharhinidae__Carcharhinidae  largest family of living sharks; found worldwide especially in tropical waters; dorsal fin lacks spines: requiem sharks including tiger sharks and soupfin sharks
  supertype:  fish_family  any of various families of fish
  member of:  subclass_Elasmobranchii
  member:  requiem_shark__requiemshark  any of numerous sharks from small relatively harmless bottom-dwellers to large dangerous oceanic and coastal species
  member:  genus_Carcharhinus__Carcharhinus  type genus of the Carcharhinidae
     member:  bull_shark__cub_shark__cubshark__Carcharhinus_leucas  a most common shark in temperate and tropical coastal waters worldwide; heavy-bodied and dangerous
     member:  sandbar_shark__sandbarshark__Carcharhinus_plumbeus  most common gray shark along coasts of middle Atlantic states; sluggish and occasionally caught by fishermen
     member:  blacktip_shark__sandbar_shark__sandbarshark__Carcharhinus_limbatus  widely distributed shallow-water shark with fins seemingly dipped in ink
     member:  oceanic_whitetip_shark__whitetip_shark__white-tipped_shark__Carcharinus_longimanus  large deep-water shark with white-tipped dorsal fin; worldwide distribution; most dangerous shark
     member:  dusky_shark__duskyshark__Carcharhinus_obscurus  relatively slender blue-gray shark; nearly worldwide in tropical and temperate waters
  member:  genus_Negaprion__Negaprion  lemon sharks
     member:  lemon_shark__Negaprion_brevirostris  common shallow-water schooling shark of the Atlantic from North Carolina to Brazil and off west Africa; dangerous
  member:  genus_Prionace__Prionace  blue sharks
     member:  great_blue_shark__blue_shark__Prionace_glauca  slender cosmopolitan, pelagic shark; blue body shades to white belly; dangerous especially during maritime disasters
  member:  genus_Galeocerdo__Galeocerdo  tiger sharks
     member:  tiger_shark__Galeocerdo_cuvieri  large dangerous warm-water shark with striped or spotted body
  member:  genus_Galeorhinus__Galeorhinus  a genus of Carcharhinidae
     member:  soupfin_shark__soupfinshark__soupfin__Galeorhinus_zyopterus  Pacific shark valued for its fins (used by Chinese in soup) and liver (rich in vitamin A)

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