Dangerous predators such as sharks
The shark is cruel and ruthless hunter, she attributed various unimaginable properties. The shark is one of the main characters of myths and legends of the peoples inhabiting the Polynesian Islands and the Hawaiian archipelago…
But with time and the development of technological advances, the sharks became the hunted. A prerequisite for this is that the shark fin soup and the liver is attributed to the properties of a panacea. Plus, a man takes revenge for the fact that some sharks are man-eaters.
The shark is a collective name. There is a white shark, blue, tiger, cat, soup, mackerel, shark-Fox, nurse shark, hammerhead shark. Scientists consider 350 species of these fish. And only 27 of them are accused of attacks on humans. And a few that occur only once.
Classification of sharks
Sharks belong to the superorder of cartilaginous fish that includes eight teams, twenty families and about 350 species.
Whale sharks are the largest of all the sharks. Their length reaches to 20 meters and weight up to 20 – 25 tons. However, despite such impressive sizes, the whale shark feeds exclusively on plankton and small fish, which she sucks together with water.
This method of feeding due to physiological characteristics of the shark – its teeth are not prednaznacheny for crushing or biting write.
Representatives of these sharks is most similar to the ancient ancestors of all sharks. Sixgill sharks are virtually indistinguishable from prehistoric sevengill, the remains of which were found in fossilized form. The average size of these sharks are approximately 6 meters weight up to 700 kg.
Some believe sand sharks most dangerous to humans. Particularly distinguished himself in the attacks on people the grey nurse shark. The length of this shark comes up to 4.5 meters.
Sand sharks are very well armed both for the defense and for attack. For a long time these externally slow-moving creatures are considered to be very dangerous for swimmers. Fishermen, too, often suffer from sand sharks are caught in nets.
The great white shark is the perfect killing machine. The greatest number of attacks on humans shark made of this type. However, despite such a reputation, the Great white shark, very little is known. For ichthyologists still remains a mystery her life.
Nearest relative of the Great white shark have a shark Mako. This is one of the fastest and strongest sharks. When you size up to 4 m Mako weighs about half a ton. The shark is a highly developed fighting instinct, Mako is often attacked by the swordfish that does not risk to make any sea-dweller.
And here I am judging the stories, I’m afraid of sharks, though never even alive in the aquarium not seen before. A terrible panic ))) In the water will not climb up to the shark. Seriously.