The Shark's teeth

Different species of sharks have different forms of teeth and the majority of them are destined to get the prey. Eating and catching the prey depends on the form of teeth. Some species have the flat, triangle pointed teeth to cut the prey. Such teeth are characteristic for the sharks that eat the fishes. But those that live near the seaside have the mandible with wide teeth that are destined to cut the shells. And the third form is long pointed teeth. Such form of teeth is good to hunt the escaping prey and in the majority of cases the prey is swallowed without chewing.
The shape and the form of some teeth of sharks are changed with the age and the nutrition. Sharks regularly loose their teeth however the new ones always substitute the lost ones. If the front tooth is lost the back tooth simply moves forward. Usually sharks have seven lines of teeth.
As the top mandible is not connected with the skull, it has the ability to move freely. The moment when the shark attacks it raises its head and the mandible caves out. The teeth get inside the prey and the shark starts to move its head from one side to another trying to get the piece of the prey.
You should keep at the minimal distance of the length of two maritime animals from the shark. And of course never show your fear and be careful. Or else the shark may show you its several lines of teeth. Sometimes the shark changes about 30 thousand of teeth during its life.