Thresher shark, (genus Alopias), any of three species of sharks of the family Alopiidae noted for their long, scythelike tails that may constitute almost one-half their total length. Thresher sharks belong to the order Lamniformes (from the Greek word, Lamna, “fish of prey”), which also includes the Great White shark. Thresher sharks are also called Fox sharks and are split up into three living species: Pelagic Thresher, Bigeye Thresher and Common Thresher. They are brown, gray, bluish gray, or black, with gray or white sides and white abdomens. These sharks are known as obligate ram breathers (or obligate ram ventilators); only about two dozen of the 400 identified shark species are required to maintain this forward swimming motion [source: Bennetta]. The maximum length of Thresher shark is noted 6.1 meters yet. The thresher shark has one of the most dangerous tails in the ocean. The most notable feature of the thresher shark is the long, whip-like upper lobe of their tail, which is known as the caudal fin. They can grow to a maximum of about 20 feet in length. Pelagic thresher sharks mate via internal fertilization and give live birth to only two very large pups. Whale sharks do not pose a danger to humans. Thresher Sharks, or Fox Shark, have a distinctive long thresher-like tail that can be as long as the shark itself. Thresher sharks mate in midsummer. This species poses very little threat to humans. All sharks are rare in Greece, and those that are seen or caught by fishermen are usually from less-dangerous types—basking sharks, thresher sharks, and dogfish. Interactions with humans. Most likely, the closer relative of the Fox Shark is the Megamouth Shark. Thresher sharks reproduce each year and are ovoviviparous, meaning that eggs develop inside the mother's body, but the young are not attached by a placenta. Though they give live birth, Pelagic Threshers do not connect to their young through a placenta. The Thresher Shark dive experience offered in Malapascua is one of the most unique places to dive in the world. Baby Thresher Shark: The female sharks produced the baby thresher shark through the ovoviviparous process. But on occasion, they join together in large groups. Like the fast-swimming sharks of the family Lamnidae, the common thresher has a strip of aerobic red muscle along its flank that is able to contract powerfully and efficiently for long periods of time. They’re called “endoderms”, which means that they have special thermoregulation. A 18 foot female contained four young that weighed 13.5 pounds each and were 4 to 4.5 feet long. The largest known Thresher Sharks reach a length of more than 6 meters (20ft) and weigh 600 kilograms (216 pounds). But do you know how to … Mating occurs in mid-late summer. The largest threat of injury is divers getting hit with the enormous tail. In the Atlantic Ocean, they can be found from Newfoundland to Cuba. After a gestation period of about 9 months, females bear two to four live pups in the spring. Because their large size and powerful tails could potentially cause serious injury, however, thresher sharks should be avoided. If they did, it would be easy to replicate their diet, but not to prevent collisions with the sides of the tank. Sharks are common down to depths of 2,000 meters (7,000 ft), and some live even deeper, but they are almost entirely absent below 3,000 meters (10,000 ft). After a gestation period of about 9 months, females bear two to four live pups in the spring. The pelagic thresher is the smallest of the species, with a length of around 10 feet (3 m). Four pups are produced annually. Thresher Shark Size: Generally, this species of sharks hardly reaches the length of 2-5 meters. Thresher sharks have never been known to attack humans and are not considered a threat to people in the water. Their most noticeable characteristic, as noted above, is that the top lobe of their tail is unusually long and whip-like. Thresher Sharks Kill Prey with Tail. The common thresher can reach up to 20 feet (6 m) long — tail included. They’re deadly at both ends, because they’ve managed to weaponise their tails. But the exact habitat, again, remains largely a mystery. These sharks are not social creatures; they are often found alone and live solitary lives. Common threshers are active, strong swimmers, with infrequent reports of them leaping completely out of the water. They’re thresher sharks, descending on Pacific shores to slash, feed and, in some instances, bear young. They reach their maturity between 8 and 13 years old and live about 22 years. Just like great white sharks, they do not do well and require very large habitats to survive. This is the primary concern with keeping large, pelagic sharks. After nine months of gestation, females give birth to two to seven live young who are three to five feet long at birth. Interestingly, nurse sharks are quite different from other sharks in regards to their sleeping habits: they tend to sleep in groups of sharks that may include up to 40 different sharks. Common Thresher Sharks live in temperate waters around the world. Baby Thresher Shark: The female sharks produced the baby thresher shark through the ovoviviparous process. One of these species, the Pelagic Thresher shark (Alopias Pelagicus), is known to inhabit the waters of Malapascua Island. Thresher sharks live for more than 20 years. Year: 2011. cc-by-nc-sa-3.0 Thresher Shark Habitats. Each spring, an invasion force charges the coast of Southern California brandishing rapiers and murderous ­intentions. They grow slowly, but can reach up to 20 feet long. She serves as the executive director of the Blue Ocean Society for Marine Conservation. 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