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The shark, makes the phone call to the angle, the angle shark, in the ancient times shark, was in is been called "in this nautical mile wild wolf" sea giant monster. Shark's nostril lies down in mouth belly front, some have the nose fossae, once middle participated in it in the nose quoin, brought time already to increase and the external environment contact area by the nose inspiration pleat level in the bag. The shark is a cartilaginous fish, on a person the aerocyst body, adjusts and rises and starts to be decided it is main to the big liver. According to the fossil investigation, a scientist calculated that study, the shark already lives on the place the about for 1.8 hundred million years, it sometime ago already has as early as existed in more than 3 hundred million years, up to now, appeared changes is not big, proved its survivability was extremely formidable.