Averaging around 3.1 m (10 ft) and preferring cooler waters,[4] the blue shark migrates long distances, such as from New England to South America.

[citation needed] The five senses that blue sharks share with other members of the Carcharhinidae family is vision, hearing, lateral line, chemoreception, and electroreception.

It consists of a membranous labyrinth that is made up of three semicircular canals that are filled with fluid and arranged orthogonally, as well as three otolithic organs, which are the sacculus, utriculus, and lagena.

[15] Blue sharks' chemosensory system is made up of gustation (taste), olfaction (smell), which is a common chemical sense.

Gustation is mainly related to feeding and involves using taste buds to process food and assess its palatability through direct contact, which usually results in a decision to swallow or reject it.

[15] Blue sharks can detect weak electrical potentials generated by inanimate objects and other animals through specialized receptors.

Each ampulla consists of a pore on the surface of the skin, connected to a narrow dermal chamber called an ampullary bulb by a small canal with a diameter of about one millimetre.

[15] In the northeastern coast of the United States, it is discovered that blue shark are able to maintain a straight courses for hundreds of kilometres over many days.

Five reproductive variables are examined for their relationship to body growth: presence or absence of semen in the ductus deferens ampullae, length and wet weight of the testicle, Size and rigidity of the claspers.

[19] Female blue sharks are classified as immature, subadult, or mature based on the size and development of their ovary, oviducal gland, and uterus.

Immature females have an undifferentiated oviducal gland and uterus, a small right ovary lodged within the epigonal organ, and no visible follicles.

[18] Blue sharks are viviparous, with a yolk-sac placenta, giving birth to 4 to 135 pups per litter after a gestation period of 9 to 12 months.

Research suggests that females may exhibit natal and reproductive philopatry, meaning they return to specific sites to give birth.

These increases in speed often occur during brief dives, particularly at night when sharks exhibit more vertical movement, ranging from shallow waters to depths exceeding 100 meters.

[23] Squid are the most important prey for blue sharks, but their diet includes other invertebrates, such as cuttlefish, blanket octopuses, and pelagic octopuses, as well as lobster, shrimp, crab, a large number of bony fishes (such as long-snouted lancetfish, snake mackerel and oilfish), small sharks, mammalian carrion and occasional sea birds (such as great shearwaters).

[24] Whale and porpoise blubber and meat have been retrieved from the stomachs of captured specimens and they are known to take cod from trawl nets.

Blue sharks may eat tuna, which have been observed taking advantage of the herding behaviour to opportunistically feed on escaping prey.

[27][28] Despite having excellent binocular vision and the capacity to see ahead when pursuing prey, research indicates that blue sharks are not always adept at spotting predators approaching from behind.

Blue sharks are not totally helpless against a tail-on approach, though, as they can adjust their escape performance based on the reaction distance.

[29] Rather than reacting at a greater distance and trying to swim away at a high sustained speed, blue sharks likely concentrate their energy on outmaneuvering predators with sharp turns and brief bursts of acceleration.

Blue shark meat is edible, but not widely sought after; it is consumed fresh, dried, smoked and salted and diverted for fishmeal.

[35][36] The blue shark that survived the longest in captivity was captured in Shizugawa Bay on July 27, 2018, and taken to the Sendai Umino-Mori Aquarium.

[34] Attempts of keeping blue sharks in tanks of various sizes, shapes and depths have shown that they have trouble avoiding walls, aquarium windows and other smooth surfaces, eventually leading to abrasions to the fins or snout, which may result in serious infections.

[33][34] To keep blue sharks, it is therefore necessary with tanks that allow for relatively long, optimum swimming paths where potential contact with smooth surfaces is kept at a minimum.