Sharks are a type of fish. There are more than 350 kinds of sharks. A shark can hear a fish from a mile away I thought that was really cool. Sharks can also smell 1 drop of blood in 1 million drops of water. THAT IS CREEPY!!!!!!!!!!!! Sharks teeth have been used for weapons and tools. About 100 people get bitten by a shark in1 year, 5 to 10 die.