Human remains found on South Australian beach could belong to missing snorkeller

Duncan Craw, initially believed to have been killed by a shark, may have suffered medical episode', his family says

Human remains have been discovered near where it was thought a man had been killed by a shark while snorkelling with his family off the South Australian coast.

Police are investigating whether the remains belong to Duncan Craw, 32, who disappeared on Thursday near Port Macdonnell in the state's south-east.