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Family Carcharhinidae - Requiem sharks
Order:	Carcharhiniformes
Class:	Elasmobranchii (sharks and rays)
No. of Genera:	12
No. of Species:	50
Environment:	Fresh:  Yes     Brackish:  Yes     Marine:  Yes
Aquarium:	none
First Fossil Record:	lower  Tertiary,   lower  Eocene             Ref.:      Berg, L.S..1958
Remark:	Distribution: global. Gill openings 5, the fifth behind origin of pectoral fin. Small to large sharks with round eyes, internal nictitating eyelids, no nasoral grooves or barbels, usually no spiracles. Teeth usually bladelike with one cusp. Development usually viviparous with young born fully developed. Includes several dangerous species, but most prefer to avoid divers.
Etymology:	Greek, karcharos, -ou = cutting, sharp and also a kind of shark + Greek, rhinos = nose ( Ref. 45335).
Division:	Marine
Reproductive guild:	bearers
Typical activity level:	active
Main Ref.:	Compagno, L.J.V..1984
Coordinator:	Compagno, Leonard J.V.
Show species | Nominal species list for Carcharhinidae | Identification keys | CAS specimen photos | References

Update | Add new Family	Ref.:				Glossary
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Page created by: Eli, 04.10.04, last modified by: Eli, 22.11.04