seas and oceans of our planet are the habitat of many living creatures.Among them are predators, which, undoubtedly, are the sharks.These fish are also the most ancient inhabitants of our planet.They appeared in the waters of the earth about 400 million years ago, that is, long before the dinosaurs.And today, many shark species thrive on sea spaces.Scientists were able to count more than 350 of these species and, in their opinion, is not the limit.
skeletal structure of these predators is unique.It consists only of the cartilage and bones of these fish at all.Also, all types of sharks have unique teeth.They are big, sharp and jagged edges.These teeth are arranged in five or even seven rows.And if the shark broke a tooth, then in its place it grows a new one.Thus, each of which has up to six "life."And these teeth are ready to tear and bite anything that even something reminds them food.
But not all sharks are dangerous to humans.Only four of them are "earned" itself a reputation for unprovoked attacks on people, after which there were fatalities.This species such as the tiger, white, whitetip and bull shark.
And the first place in this rating belongs, of course, the white shark.This is not only because of the "black PR", which staged this shark media.After all, this kind of shark evolved millions of years.And over the years he had become a perfect hunter.White shark through a sensitive sense of smell can smell blood in the smallest concentrations, at a distance of 5 kilometers.It also has excellent natural camouflage.The blue and white color on top of the bottom makes it invisible in the surface.And her teeth, as well as speed and attack power do not give the victim no chance to avoid an attack.Usually it causes the victim below the rapid impact and makes a powerful bite.After that, the white shark swims away to the side and waiting for prey bleed to death.
other shark species such as the tiger, whitetip and roundnose also capable of inflicting fatal damage to man.In second place in this list is the tiger shark.It is very common in bays, estuaries, small places in the islands.This shark is coming close to the shore, and it is mainly exposed to attacks swimmers, surfers and divers.Although such attacks do not happen very often underestimate the danger of this kind is not necessary.
A bull shark lives off the coast of Africa, India and other third world countries.Statistics are being very poorly.Therefore, the exact number of attacks on the person of the shark species can not fix.And, perhaps, bull shark is even more dangerous than white and brindle.After all, she lives in shallow waters and near densely populated shores.Also, it often comes in fresh water and there in the shallows.Yet it does not have a readily recognizable appearance as the other sharks.And often it attacks blamed on the "shark of unknown species."Therefore, and its place in the ranking of hazardous difficult to determine.
is also difficult to determine the number of attacks on people from the whitetip sharks.It inhabits the open sea and the coast appears rarely.And most of the attacks on her side committed during the First and Second World War.Then, many ships and planes were wrecked at sea.And white-tip sharks are usually found themselves on the site of the wreck first.Stories are cases when the victims of this kind during such disasters Stavan dozens of people.
also registered cases when people are attacked by sharks and others.This species such as blue, silk, lemon and gray sharks temnoperaya.Also, this list may include hammerheads, mako shark, Galapagos shark.These predators are large enough and strong.If a person would be in the wrong place or with time, it may be the victim of any of these species.And the other specimens, which are smaller, too, can cause quite severe injuries to people.But it happens mostly because of deliberate provocation by the people.
Most shark attacks relate to their natural sense of curiosity.They met in their territory an unknown object, try to learn it.And the only way that they can use for this is to bite.And usually after such a "survey" sharks swim right away.Also, they may mistakenly take the person for a fish or seals.This happens usually in the muddy water, and suffer from these errors mainly surfers.But whatever the reason for the attack, a person may suffer from them very seriously, especially when "gets to the tooth" white or tiger sharks.
