Most sharks are meat eaters. Not all them eat meat, though. Some like plankton. Sharks are born hunters. They prey on injured or weak fish or animals.
Sharks can see well and they are very sensitive to movement.
They have a great sense of smell, too. Most sharks hunt alone, but the hammerhead sharks hunt in schools. Of the 360 different kinds of sharks, only 4 are truly harmful to humans. Sharks are more endangered by man, than man is of them. For many sharks it takes over 40 years to reproduce.