9/27/2023 0 Comments Swinsian ked the sharkRecords from the Atlantic show a regular clockwise migration within the prevailing currents. 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). 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. Sharks have been observed and documented working together as a "pack" to herd prey into a concentrated group from which they can easily feed. Blue sharks may eat tuna, which have been observed taking advantage of the herding behaviour to opportunistically feed on escaping prey. The observed herding behaviour was undisturbed by different species of shark in the vicinity that normally would pursue the common prey. The blue shark can swim at fast speeds, allowing it to catch up with prey easily. Its triangular teeth allow it to easily catch hold of slippery prey. Young and smaller individuals may be eaten by larger sharks, such as the great white shark and the tiger shark. Killer whales have been reported to hunt blue sharks. This shark may host several species of parasites. For example, the blue shark is a definitive host of the tetraphyllidean tapeworm, Pelichnibothrium speciosum ( Prionacestus bipartitus). It becomes infected by eating intermediate hosts, probably opah ( Lampris guttatus) and/or longnose lancetfish ( Alepisaurus ferox). Northern elephant seals ( Mirounga angustirostris) and Cape fur seals ( Arctocephalus pusillus pusillus) have been observed to feed on blue sharks. Relationship to humans īlue shark meat is edible, but not widely sought after it is consumed fresh, dried, smoked and salted and diverted for fishmeal. There is a report of high concentration of heavy metals ( mercury and lead) in the edible flesh. The skin is used for leather, the fins for shark-fin soup and the liver for oil. ![]() #PICTURES OF DEEP BLUE SHARK WITH DIVERS SKIN# ![]() Blue sharks are occasionally sought as game fish for their beauty and speed.īlue sharks rarely bite humans.
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