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The typical minimum great hammerhead measures 3.5 m (11 ft) long and weighs over 230 kg (510 lb), while the maximum measures 4.6 m (15 ft) long and weighs 449.5 kg (991 lb). A small percentage of the population, mostly or all females, are much larger. The longest great hammerhead on record was 6.1 m (20 ft).
Off the eastern United States, reproduction occurs on an annual cycle with mating in winter and early spring. After a gestation period of 9–11 months, females give birth to 4–6 (typically five) young in fall or early winter. The newborns measure 34–37 cm (13–15 in) across. [8]
The great hammerhead shark is found in a variety of water depths such as shallow lagoons and coral reefs, and in deeper waters up to 984 feet. These sharks frequent coastal and tropical waters, as ...
Sphyrna alleni, the shovelbill shark, is a species of hammerhead shark found along the West Atlantic coast from Belize to Brazil. Its pointed cephalofoil distinguishes it from the more northern bonnethead shark (Sphyrna tiburo), from which it was split in 2024. The species is also diagnosed by different tooth and precaudal vertebrae counts. [1]
Ground sharks, like this blacknose shark, have a nictitating membrane which can be drawn over the eye to protect it.. Carcharhiniformes / k ɑːr k ə ˈ r aɪ n ɪ f ɔːr m iː z /, commonly known as Ground Sharks, are the largest order of sharks, with over 270 species.
Sharks portal; Sphyrna is a genus of hammerhead sharks with a cosmopolitan distribution in the world's oceans. Members of Sphyrna have a tendency to inhabit coastal waters along the intertidal zone rather than the open ocean, as their prey such as invertebrates, fish, rays, small crustaceans, and other benthic organisms hide in the sands and sediment along these zones.
Only large sharks such as the tiger shark (Galeocerdo cuvier), the great hammerhead shark (Sphyrna mokarran), the bullshark (Carcharhinus leucas), dolphins, the false killer whale (Pseudorca crassidens), and the killer whale (Orcinus orca), are capable of preying on the ray. Nonlethal shark bites are very common occurrences, with a vast ...
Under this interpretation, the winghead shark is the most derived hammerhead, as it has the most extreme cephalofoil morphology. However, molecular phylogenetic research based on isozymes, mitochondrial DNA, and nuclear DNA have found the opposite pattern, with the winghead shark as the most basal member of the hammerhead family. This result ...
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