A 51 year old, Brian Guest, who was snorkelling with his 24 year old son in waters near Port Kennedy south of Perth, is believed to have been taken by a shark.The incident happened at around 7am on 27 December while he was snorkelling for crabs in relatively shallow water.
Witnesses did report seeing a shark in the area. A search by six boats and a helicopter have failed to find Mr. Guest, although there are reports that part of a wetsuit has been found.
According to a news.com.au article, Brian Guest had told Western Angler website forums in 2004 and 2005 that he did not believe in killing sharks. Police have apparently said there would be no hunt for the shark involved.
You can read more from WAToday, the Daily Mail and the BBC.