THE BIGGEST• The megalodon was a giant shark that lived in prehistoric times, between about 18 million to 1.5 million years ago and was the ape predator of its time. It is the largest carnivorous fish known to have existed, and quite possibly the largest shark to have ever lived. It is believed that the average size of the megalodon was between 12 meters (39 ft) and 18 meters
•The great white shark, Carcharodon carcharias, also known as white pointer, white shark, or white death, is an exceptionally large landform shark found in coastal surface waters in all major oceans. Reaching lengths of more than 6 m (20 ft) and weighing up to 2,250 kg (5,000 lb), the great white shark is the world's largest known predatory fish. It is the only surviving species of its genus, Carcharodon.
•He has about 300 teeth, shared in 3 rows
•His bite pressure are of 270kg
The senses
• Great white sharks, like all other sharks, have an extra sense given by the Ampullae of Lorenzini, which enables them to detect the electromagnetic field emitted by the movement of living animals. Every time a living creature moves it generates an electrical field and great whites are so sensitive they can detect half a billionth of a voltThe great white's nostrils can smell one drop of blood in 25 gallons (100 liters) of water
• sharks' vision is slightly better (7x better) than human vision, allowing them to see as far as 50-60 feet underwater in good condition
• sharks' skin is made up of "tooth-like structures" called dermal denticles that provide for a hydrodynamic skin surface
DIET AND HUNTING
• Great white sharks are carnivorous, and primarily eat fish(including rays, tuna, and smaller sharks), dolphins, porpoises, whale carcasses and pinnipeds such as seals, fur seals and sea lions and sometimes sea turtles. Sea otters and penguins are attacked at times although rarely, if ever, eaten. Great whites have also been known to eat objects that they are unable to digest. In great white sharks above 3.41 m (11 ft, 2 in) a diet consisting of a higher proportion of mammals has been observed
RELATIOSHIP WITH HUMANS
• In the Mediterranean Sea there were 31 confirmed attacks against humans in the last two centuries, only a small number of them deadly
• Many incidents seem to be caused by the animals "test-biting" out of curiosity.
• More people are killed in the U.S. each year by dogs than have been killed by great white sharks in the last 100 years.
• 73 million of sharks are killed each year because of his fin-that are much appreciated by Japanese and Chinese
