The Great White has been known to attack fisherman and fishing boats. These attacks are usually nonfatal. Small sharks from 7-10 feet mainly eat fish like cebazon and sometimes a leopard shark from time to time. His teeth are his main defense. A simple snip here, and a snap there, and you'd be in immense pain.
Sharks belong to a group known as elasmobranchs.
Rays and skates belong to this group too. The class name of sharks is chondrichthyes. Scientists don't know how many sharks there are. They frequently are identifying new species of sharks. I bet you would think that the Great White doesn't have anything cool about them.