The shark pictured is a 10 foot long Great White. Notice the size of the bite out of it's belly. Shark experts estimate the size of the attacking shark to be in excess of 20 feet!! I don't think I would ever go in the water if I lived around Brisbane, Australia!! :o
http://www.foxnews.com/story/0,2933,569764,00.html?loomia_ow=t0:s0:a4:g4:r8:c0.000000:b0:z5 (http://www.foxnews.com/story/0,2933,569764,00.html?loomia_ow=t0:s0:a4:g4:r8:c0.000000:b0:z5)
Don't worry, it's still smaller than Jaws :P