|any shark of the family Carcharhinidae, occurring mostly in tropical seas and characterized by a nictitating membrane and a heterocercal tail. The family includes the tiger shark and the soupfin|
|[C17: French requiem probably assimilated from a native name]|
any member of the shark family Carcharhinidae, which includes about 13 genera and numerous species found worldwide. Carcharhinids are found primarily in warm and temperate ocean waters, though a few species inhabit fresh or brackish water. The Carcharhinidae is the largest family of sharks and includes the majority of sharks alive today. Some of the larger carcharhinids, such as the blacktip, whitetip, Lake Nicaragua, and lemon sharks, are potentially dangerous to humans.
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