A West Australian coroner has ruled that Martyn Tann, a 24-year-old marine biologist and diver from New South Wales who vanished at a Perth beach in 2013, was most likely killed by a shark. Mr Tann disappeared while swimming at Mullaloo Beach during a visit to relatives, and despite an extensive land and sea search, no trace of him was ever found. The finding brings a formal conclusion to a case that remained unresolved for 13 years.

The inquest heard that Mr Tann was seen by several witnesses swimming out towards a buoy several hundred metres from shore, near an area where beachgoers noticed bubbling water that was later identified as a fish feeding frenzy likely to have attracted sharks. A white shirt that washed ashore at the time bore 'jagged cuts' that shark expert Dr Rory McAuley said were consistent with a shark attack. Acting state coroner Sarah Linton concluded she was satisfied that Mr Tann is deceased and that he probably died the day he entered the water.