When South African Achmat Hassiem competes in the Paralympic swimming pool he motivates himself by imagining a shark just behind -- the shark that bit off half his leg a decade ago.
A woman in the US state of Florida was rushed to a hospital after being bitten by a shark - with the whole animal still clutching on to her right arm, local media reported.
An 11-year-old boy swimming in the waters of Australia's Great Barrier Reef was mauled by a shark, the second attack in the area in four days.
