It lives as far north as Norway and as far south as Chile. In temperate seas it may approach shore, where it can be observed by divers while in tropical waters, it inhabits greater depths. he blue shark is an oceanic and epipelagic shark found worldwide in deep temperate and tropical waters from the surface to about 350 m (1,150 ft). The heaviest reported weight for the species was 391 kg (862 lb).The blue shark is also ectothermic and it has a unique sense of smell. Occasionally, a female in excess of 3 m (9.8 ft) will weigh over 204 kg (450 lb). Occasionally, an outsized blue shark is reported, with one widely printed claim of a length of 6.1 m (20 ft), but no shark even approaching this size has been scientifically documented. Large specimens can grow to 3.8 m (12 ft) long. 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. 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. Blue sharks are light-bodied with long pectoral fins. The common name comes from the blue color of the skin, unique among the sharks. They spend most of their lives far from the coast and are truly a pelagic species.

The greatest proportions of blue sharks are typically found in the Middle Atlantic States.Blue sharks are curious, open-ocean predators that live throughout the global ocean, from the tropics to cold temperate waters.

Many blue sharks won’t be able to survive for more than 13 years, and only a few ones lived up to 16 years.

The average litter size is around 30 – 50 pups.

The length of the young sharks measures around 35 – 44 cm (13.8 – 17.3 inches) at birth.

Females do not give birth until nearly 2 years after mating.

These dark indigo-colored sharks display a faded deep blue color on the sides and white on the belly.

They can be easily distinguished from other pelagic sharks by their long and narrow pectoral fins along with an extended upper lobe of the tail which is about twice as long as the lower lobe.

A migratory blue shark rarely travels clockwise around the Atlantic, apparently riding the Gulf Stream to Europe.

Sadly speaking, humans kill around 10 – 20 million blue sharks each year in the name of fishing.

Some of the most common predators of blue sharks are killer whales, tiger sharks, great white sharks, and of course humans.The weight of blue sharks measure around 27 – 55 kg (60 – 120 lb) in males while the large females weigh up to 93 – 182 kg (210 – 400 lb).Blue sharks display deep blue color from the top while its undersides are white.

Blue sharks can be as long as 3.8 meters (12 ft). The females can reach a length of 2.2 – 3.3 meters (7.2 – 11 ft) at maturity.The male blue sharks measure around 1.82 – 2.82 meters (6.0 – 9.3 ft) in length at maturity.While moving quickly through the water, blue sharks feed on bony fish, squid, and carrion.The average lifespan of blue sharks is 20 years. They reach the maturity age after 5 – 6 years. They are also found to litter as much as 135 pups. Blue sharks viviparous and they give birth to 25 – 100 pups after a gestation period of 9 – 12 months.

Deep blue shark weight