![]() In contrast to other shark species, the blue shark is not a regular victim of commercial fishing although it is usually caught by fishing nets incidentally. The blue shark is not a regular victim of commercial fishing. Later, the newborns separate from their mother who does not provide any parental care. An unusual case was a mother that had 130 pups, but the average amount ranges between 25 and 50. After a gestation period lasting between 9 and 12 months, the female gives birth to a large number of offspring. The frequency which females give birth or the time that the deposited sperm is stored after the intercourse is still uncertain, but the blue shark migrates northward to deliver their offspring. After mating both separate and do not join again, since this species is polygamous. Upon accepting, the male inserts its clasper into the female’s oviduct and transfers the sperm to fertilize the eggs. During the process of courtship, the male bites the female between the second and the first dorsal fin. The Blue shark reaches sexual maturity at around 5 or 6 years old, after which can reproduce through viviparity. The blue shark is nomadic and shows a clockwise migration pattern following the Gulf Stream to the Caribbean, passing along the coast of the United States, Eastern Europe, Southern Africa and back to the Caribbean. ![]() If this happens, it then becomes one of the fastest fish. It is a slow-swimming animal that increases its speed when feeling stimulated by external factors, such as the presence of animals from which it can feed on. Its swimming speed and its triangular teeth help this shark tearing the skin and flesh of the most complicated animals. When needed it joins with other sharks of the same species and cooperates to attack larger prey and facilitate their capture. The blue shark surrounds its prey before attacking it. They usually seek to catch small prey, but if they find large mammal carrion, it becomes part of their food. Its diet includes octopus, squid, mackerel, tunas, lobsters, crabs, small sharks and occasionally seabirds. It is a carnivorous predator that feeds on about 24 species of cephalopods and 16 species of fish. It inhabits the epipelagic and mesopelagic zones near the coasts and the continental shelves, but if it dwells tropical waters, then it tends to go towards deeper waters. It fancies approaching the shores, where divers and boats see it often. It concentrates mainly in latitudes between 20 ° and 50 ° north and likes waters with temperatures of between 7 ° and 16 ° centigrade, although it can tolerate warmer temperatures slightly above 21 ° Celsius. It lives near the coasts except those of Antarctica. It dwells temperate, tropical and subtropical waters up to 350 meters deep. The blue shark inhabits in a great diversity of areas around the world. It is the most distributed shark in the world. This species presents slight sexual dimorphism since the female tends to measure little more than 1 meter in comparison with the male. It reaches a length ranging from 3.8 to 4 meters and weighs about 240 kilograms. Its eyes are large, its teeth are triangular, and it has a conical snout. The second dorsal fin measures almost half the size of the first and its pectoral fins are unusually long compared to other sharks. The upper part is an indigo blue tone while the ventral and the sides are white. It exhibits countershading like many other sharks. The aerodynamic shape and lightness of the blue shark body allow it to move “elegantly” across the oceans. It is a member of the order Carcharhiniformes, of the family Carcharhinidae and the Genus Prionace. The term “glauca” comes from the Latin meaning “blue-gray” or “green.” It is the most distributed shark in the world. In the video, the gargantuan creature swam up to the crew's dive cage and poked around curiously before disappearing back into the blue.The “ Prionace glauca” is a beautiful shark, with a blueish skin which gives it its common name. Mauricio Hoyos Padilla, a shark conservationist working for Discovery's "Shark Week," shot jaw-dropping footage of the massive creature off Mexico's Guadalupe Island in 2013. It's thought that she could be more than 50 years old. ![]() ![]() Her name is Deep Blue and, at an estimated 20 feet long and possibly still growing, she's widely considered to be among the largest great white sharks ever caught on camera. LOS ANGELES - The average great white shark clocks in between 11 and 15 feet long, but one great white spotted just a few times in recent years blows her brothers and sisters out of the water. Deep Blue, a 20-foot great white shark spotted off the coast of Guadalupe Island, is widely considered to be among the biggest great white sharks ever filmed.
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