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Family Sphyrnidae - Hammerhead, bonnethead, or scoophead sharks
Order:	Carcharhiniformes
Class:	Elasmobranchii (sharks and rays)
No. of Genera:	2
No. of Species:	8
Environment:	Fresh:  No     Brackish:  Yes     Marine:  Yes
Aquarium:	none
First Fossil Record:	upper  Cretaceous,                 Ref.:      Berg, L.S..1958
Remark:	Marine, coastal; occasionally in brackish water. Distribution: global (chiefly warm waters). Head laterally expanded, with eyes and nasal openings much wider set than in other sharks. The blades presumably server to increase the sharks' sensory capabilities. No spiracle. A maximum length of 4.5 m was reported for Sphyrna tudes. They feed on a wide variety of bony fish, elasmobranchs, cephalopods, crustaceans, and other prey. Young born fully developed. Potentially dangerous.
Etymology:	Greek, sphyra = hammer. ( 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 Sphyrnidae | Identification keys | CAS specimen photos | References

Update | Add new Family	Ref.:				Glossary
		( e.g. 9948)				( e.g. cephalopods)

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Page created by: Eli, 04.10.04, last modified by: Eli, 22.11.04