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Statistics: Depending on where you are in the ocean, and what type of shark could be in the area, your chances of an attack are different. Out of the 5 most common shark species - Great White, Tiger, Bull, Sand Tiger, and Hammerhead - the Great White tops them all with 231 unprovoked attacks, and a complete total of 311 attacks. The Tiger Shark had a total of 104 attacks, 67 of them being unprovoked. Bull Sharks had 57 unprovoked attacks & a total of 69 attacks. The Sand Tiger shark had a total of 53 attacks, 31 being unprovoked, and the Hammerhead with a total of 31 attacks, 17 being unprovoked. Out of all 42 species of sharks, there have been 566 unprovoked attacks, and 882 attacks in total.
All About Sharks
How to avoid attacks: There are several things you can do to avoid a potential shark attack: -Never swim, surf, or dive by yourself. If you do get attacked, at least someone is there to help; also the mere presence of another person may actually deter any potential attacker. -The times between dusk and dawn are when sharks most actively feed, so avoid swimming in the ocean during those times. You also wont be able to see well if something happens! -If there has been a recent attack, or a shark longer than 5 feet has recently been seen in your area, don't go swimming! -It is best you avoid entering the ocean near rivermouths, especially after rain, because organic molecules can wash into the sea, which may attract sharks. -Wearing a mask or goggles and checking the water often could help you see any approaching shark, and allow you time to get out quick. -Pay attention to the area you are in. If fish suddenly start swimming in a frenzied manner, or suddenly disappear, leave the area quickly. -Keep a first aid kit with you! Having the proper tools, and some training, may help you save a life!
Why do Sharks attack? Originally, it was thought that sharks attack people to eat them, however that theory turned out to be unconsistent with the available data. Most shark attack reports have stated that the attack consisted of a single strike which would include little to no flesh removal, then the attacker would leave. This made people think that the humans are mistaken for a seal, or even a sea turtle, however larger sharks like the White or Tiger Sharks usually feed on small schooling fish or squid. Besides, wouldn't the attack be more vicious and worse if the shark was looking for a meal to actually eat? The next theory is that sharks are just curious - which they are - so they may want to check out what that weird looking swimming object is. Unfortunately, sharks use their mouths to "feel" things since they lack hands. Finally, the thought of sharks atacking for self-defense has also come up. In the end, we may never know exactly why sharks attack!
http://www.nwf.org/News-and-Magazines/National-Wildlife/Animals/Archives/2007/Great-White-Rocket.aspx
http://animals.nationalgeographic.com/animals/fish/sandtiger-shark.html
