Based on DNA studies and fossils, the ancestor of the hammerheads probably lived in the Early Miocene epoch about 20 million years ago. Their closest relatives are the requiem sharks (Carcharinidae). ![]() Since sharks do not have mineralized bones and rarely fossilize, only their teeth are commonly found as fossils. Taxonomy and evolution A hammerhead shark gliding along the sea bed National Geographic explained that hammerheads can be found in warm, tropical waters, but during the summer, they participate in a mass migration to search for cooler waters. In the evening, like most other sharks, they become solitary hunters. Some species are also known to form schools. Hammerheads have disproportionately small mouths compared to other shark species. While overall similar, this shape differs somewhat between species examples are: a distinct T-shape in the great hammerhead, a rounded head with a central notch in the scalloped hammerhead, and an unnotched rounded head in the smooth hammerhead. Their heads have lateral projections that give them a hammer-like shape. ![]() Their bellies are white, which allows them to blend into the background when viewed from below and sneak up to their prey. They are usually light gray and have a greenish tint. One specimen caught off the Florida coast in 1906 weighed over 680 kg (1,500 lb). Unlike most sharks, some hammerhead species will congregate and swim in large schools during the day, becoming solitary hunters at night. Hammerheads are found worldwide, preferring life in warmer waters along coastlines and continental shelves. The cephalofoil gives the shark superior binocular vision and depth perception. Many different- but not necessarily mutually exclusive-functions have been postulated for the cephalofoil, including sensory reception, manoeuvering, and prey manipulation. Most hammerhead species are placed in the genus Sphyrna, while the winghead shark is placed in its own genus, Eusphyra. The shark’s eyes are placed one on either end of this T-shaped structure, with their small mouths directly centered and underneath. 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"). In other news about the game, a lawsuit filed against Studio Wildcard could mean the developer will have to remove it from sale, though whether or not this will happen remains to be seen.The hammer-like shape of the head means that hammerhead sharks can sweep for prey more effectively. On PC, Ark was recently split into two games-the regular Ark and a free-to-play version called Survival of the Fittest. The finished version is scheduled to come out this year across Xbox One, PlayStation 4, and PC.
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