hammerhead shark - Search
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  2. Description

    The known species vary in size, ranging from 0.9 to 6.0 m (2 ft 11 in to 19 ft 8 in) in length and weighing from 3 to 580 kg (6.6 to … See more

    Hammerhead shark - Wikipedia

    • The hammerhead sharks are a group of sharks that form the family Sphyrnidae, named for the unusual and distinctive form of their heads, which are flattened and laterally extended into a cephalofoil (a T-shape or "hammer"). The shark's eyes are placed one on each end of this T-shaped structure, with their small mouths directly centered and underneath. … See more

    Taxonomy and evolution

    Since sharks do not have mineralized bones and rarely fossilize, only their teeth are commonly found as fossils. Their closest relatives are the requiem sharks (Carcharinidae). Based on DNA studies and fossils… See more

    Reproduction

    Reproduction occurs only once a year for hammerhead sharks, and usually occurs with the male shark biting the female shark violently until she agrees to mate with him. The hammerhead sharks exhibit a viviparous mode … See more

     
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