Common types of sharks include the great white, the mako, the thresher, the hammerhead and the black tip. The spinner shark, the black nose, the Atlantic sharpnose and the bull shark are also common within their ranges.
The black tip shark grows to be about 8 feet long, has black tips on its fins, and is thought to be responsible for shark attacks where the victim is bitten once and left alone, or "hit-and-run" attacks. The thresher shark has a very long upper tail fin that it uses to herd fish into a group while hunting. The white shark, or great white, is common in oceans all over the world. It can grow to 21 feet long, making it the world's largest fish predator. Juvenile great whites are most common near shorelines.
The spinner shark grows to be about 6 feet long and is frequently seen leaping out of the water and spinning in circles. Bull sharks are aggressive sharks who grow to be around 11 feet long. They can survive in fresh water, and are sometimes found hundreds of miles from the ocean in the Amazon river. Nurse sharks are very common bottom-dwelling sharks who pose no threat to humans when left alone.