A 12-year-old boy is fighting for his life in hospital after being mauled by a large shark in Sydney Harbour, Australian police said on Monday.The marine predator struck on Sunday afternoon while the boy and his friends were jumping into the water off the harbour’s Shark Beach.“It was a horrendous scene at the time when police attended. We believe it was something like a bull shark that attacked the lower limbs of that boy,” said Superintendent Joseph McNulty, New South Wales marine area...