Sharks like the great white can smell blood up to 3 miles away. According to National Geographic, sharks can smell one drop of blood in 25 gallons of water, 3 miles away.
Sharks like the great white shark are carnivores, meaning their diet consists of meat. Great whites grow to be about 15 feet long and can weigh up to 5,000 pounds. They have a gray body meant to blend in with the ocean bottom and are called "great white" sharks because of their white underbellies.
When one animal attacks another and blood is spilled, that blood can attract sharks for miles around. The shark's keen senses allow it to quickly hone in on the source of the blood and sharks often take a test bite to find out if a meat is suitable for eating. This test bite is what is likely what is happening when a shark bites a human.Learn More
The nurse shark has thousands of small notched teeth. The jaws of the nurse shark are powerful and are used to crush hard prey, including shellfish. Fish, shrimp and squid compose the other portions of the nurse shark's diet.Full Answer >
The great hammerhead shark has up to several rows of teeth in each jaw, with 24 to 37 in each row. The teeth are triangular with extremely serrated edges, ideal for hunting prey. While the shark constantly loses teeth, it replaces them almost instantly.Full Answer >
Sand tiger sharks have 44 to 48 upper teeth and 41 to 46 lower teeth, so they can have anywhere from 85 to 94 teeth in total. The front teeth are long and jagged and can be seen even when the shark's mouth is shut. Many of the sand tiger shark's teeth are small and are located in the back corners of its mouth.Full Answer >
Sharks are fish, but unlike other fish, their skeletons are made of cartilage rather than bone, and instead of smooth, flat scales they have sharp, tooth-like scales called denticles. Scientists believe that sharks are 200 million years older than the oldest dinosaur, meaning they have been around for over 400 million years.Full Answer >