A 12-year-old boy attacked by a shark in Sydney Harbour remains alive in hospital but is brain-dead and will never wake up. Nico Antic was jumping into the water from a six-metre rock ledge at about 4.20pm on Sunday when he was mauled by a suspected bull shark. Both his legs were severely injured in the attack, and he survived only because one of his five friends jumped in and dragged him onto the rocks while the predator swam nearby. 'He is still asleep, but will not be able to make it because