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Predators and Threats. Due to the great hammerhead shark’s immense size, it has few known predators. However, bull sharks prey upon the pups, and the adults are hunted and killed by killer whales.
11-foot hammerhead shark with fish hooks in mouth caught by Texas angler, video shows. Huge hammerhead shark tagged by researchers was almost too much for boat, photos show. Show comments.
Most hammerhead shark species are too small to inflict serious damage to humans. [8] Man carrying a hammerhead shark along a street in Mogadishu, Somalia. The great and the scalloped hammerheads are listed on the World Conservation Union's 2008 Red List as endangered, whereas the smalleye hammerhead is listed as vulnerable.
Sphyrna alleni is a small species of shark, measuring less than 150 centimetres (4.9 ft) in length. Like other hammerhead sharks , its head is shaped into a flattened cephalofoil. The latter has a more angular anterior edge than that of S. tiburo , and bears lobes on its posterior edges, leading to it being described as "shovel-like". [ 1 ]
These sharks have a very high metabolic rate, which governs behavior in acquiring food. They occupy tertiary trophic levels. [10] The scalloped hammerhead shark, like many other species, uses the shore as a breeding ground. [10] Due to high metabolic rates, young scalloped hammerhead sharks need a lot of food, or they will starve.
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The great hammerhead catch rate in Indian Ocean has declined 73% from 1978 to 2003, though whether these represent localized or widespread depletions is uncertain. The great hammerhead is critically endangered along the western coast of Africa, where stocks have collapsed, with an estimated 80% decline in the past 25 years.
According to the International Shark Attack File, humans have been subject to just 17 documented attacks by hammerhead sharks in recent history, with no human fatalities attributed to the species.