In the past 400 years, only 13 biting incidents have been verified, of which four resulted in fatalities.
In temperate regions, they may be found offshore, but in tropical waters, they have to swim deeper to seek a comfortable temperature. Blue sharks may eat tuna, which have been observed taking advantage of the herding behaviour to opportunistically feed on escaping prey. In 2014, Deep Blue was pregnant, making her …
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. It has been suggested that prominent rockwork may be easier to avoid for blue sharks than smooth surfaces, as has been shown in captive tiger sharks. Blue sharks are viviparous and are noted for large litters of 25 to over 100 pups. , Although blue sharks are among the most abundant, widespread, and fast growing shark, they are one of the most heavily fished sharks in the world. Blue sharks are one of the most important species in the international shark-fin trade. Being a pelagic species, the shark's habitat consists of open ocean areas, from the surface to 350 metres (1,148 feet) in depth. Blue sharks are found off the coasts of every continent, except Antarctica.
Maximum lifespan is still unknown, but it is believed that they can live up to 20 years.. It is estimated that 10 to 20 million of these sharks are killed each year as a result of fishing. Female blue sharks have adapted to the rigorous mating ritual by developing skin three times as thick as male skin. Three documented attacks resulted from air or sea disasters.
It is estimated that 10 to 20 million of these sharks are killed each year as a result of fishing. The “Prionace glauca” is a beautiful shark, with a blueish skin which gives it its common name. It is a carnivorous predator that feeds on about 24 species of cephalopods and 16 species of fish. Their maximum length is about 12.5 [380 cm].
The term “glauca” comes from the Latin meaning “blue-gray” or “green.” It is the most distributed shark in the world.It is a member of the order Carcharhiniformes, of the family Carcharhinidae and the Genus Prionace.  The species is listed as Near Threatened by the IUCN.. Upon accepting, the male inserts its clasper into the female’s oviduct and transfers the sperm to fertilize the eggs.  The skin is used for leather, the fins for shark-fin soup and the liver for oil. From 1580 up until 2013, the blue shark was implicated in only 13 biting incidents, four of which ended fatally. They migrate in a clockwise direction, following ocean currents to seek water ranging in temperature from 7 to 25 C (45 to 77 F). They are a pelagic species that rarely comes near shore. For example, the blue shark is the definitive host of the tetraphyllidean tapeworm, Pelichnibothrium speciosum (Prionacestus bipartitus). SIZEAt birth, the shark is 1.1 to1.4 ft [35 to 44 cm] in length. The belly is white. Size Head (cm) XS: 53-54: SM: 55-56: MD: 57-58: LG: 59-60: XL: 61-62: 2XL(KS) 63-64: Sizing information is provided by the manufacturer and does not guarantee a perfect fit. Prey – Feeds on relatively small prey: usually squid and pelagic fish, but also invertebrates and bottom-dwelling fish and small sharks.
 The blue shark is also ectothermic and it has a unique sense of smell. Some countries have banned shark finning, but still, there are not international treaties linking all aspects of blue shark protection. The male blue shark commonly grows to 1.82 to 2.82 m (6.0 to 9.3 ft) at maturity, whereas the larger females commonly grow to 2.2 to 3.3 m (7.2 to 10.8 ft) at maturity.
The upper part is an indigo blue tone while the ventral and the sides are white. Like many other sharks, blue sharks are countershaded: the top of the body is deep blue, lighter on the sides, and the underside is white. They have been known to frequently swim to inshore areas around oceanic islands, and locations where the continental shelf is narrow. Mature females often bear bite wounds (mating scars).
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