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Uncostumed humans, however, such as those surfboarding, light snorkeling or swimming, present a much greater area of exposed skin surface to sharks. In addition, the presence of even small traces of blood, recent minor abrasions, cuts, scrapes, or bruises, may lead sharks to attack a human in their environment.
Why do sharks attack humans? According to the Shark Research Institute, there are over 400 plus species of shark around the world, which include great white sharks, tiger sharks and bull sharks ...
The most effective triggers of agonistic behaviour in sharks include: [7] [4] [1] hunger; crowding by human divers (independent or group dives) and submersible machinery; sustained targeted pursuit; invasion of the shark's idiosphere, without appropriate warning or consent [8] natural competition for resources with other organisms
The tiger shark is considered to be one of the most dangerous sharks to humans. [1] Although it is found in the Red Sea it is not usually seen near reefs during the daytime. The Grey reef shark is territorial and may be aggressive, and has been involved in non-fatal attacks on divers.
The large size and cutting teeth of the silky shark make it potentially dangerous, and it has behaved aggressively towards divers. However, attacks are rare, as few humans enter its oceanic habitat. Silky sharks are valued for their fins, and to a lesser extent their meat, hide, liver oil, and jaws.
According to the International Shark Attack File, humans have been subject to just 17 documented attacks by hammerhead sharks in recent history, with no human fatalities attributed to the species.
Unlike most sharks and other vertebrates, which have hard tissues like spines that form growth rings (much like the rings inside a tree trunk), Greenland sharks lack these structures, making age ...
Though large and powerful, the copper shark is not particularly aggressive towards humans unless in the presence of food. Copper Sharks have been known to harass and attack spear fishers in an attempt to steal catches. Copper sharks have bitten several swimmers in Australia and New Zealand, [5] [7] where the species is common. (The species is ...