At the time, some theorised that a male tiger shark kept at the zoo could have been the father - but the institution's three bonnethead females had none of the bite marks that are usually inflicted on their gender during shark sex.

BBC: NEWS | Science/Nature | Captive shark had 'virgin birth'

Police said the 26-year-old man was swimming off Coral Bay beach when a 10ft (3m) tiger shark bit his arm.

BBC: Australia shark attack on surfer is third this year