Victorian family open up about indescribable grief after snorkelling tragedy

A Victorian family has opened up about their indescribable grief after the death of father Duncan Craw while snorkelling in South Australia.

Mr Craw had been on a day out with his family at Port MacDonnell in South Australia's lower south-east about 5pm last Thursday when his wife Taylia lost sight of him in the water.

A photo of Mr Craw's son, Levi, standing in the water has inadvertently become the tragic final time the boy will be pictured with his dad, who can be seen swimming some distance behind him shortly before he disappeared.

A torn wetsuit initially led authorities to believe the 32-year-old had been attacked by a great white shark that had been spotted in the area.

"The last week has been extremely traumatic for all of us but having Levi to look at, it's just giving us that little bit of strength to keep moving forward," Mr Craw's brother-in-law Bret Trigg told 9News.

It's believed Mr Craw suffered a fatal medical episode before being taken by a shark.

"One thing that brings us comfort is to know that Duncan was already at peace," Mr Trigg said.

At Mr Craw's favourite watering hole, friends and family gathered today to remember the cricket obsessed, fun loving community leader.

"He's irreplaceable. We'll keep on going. He'll always be remembered," Sam Monk, one of Mr Craw's colleagues, told 9News.

While he has been laid to rest today, Mr Craw's family will continue to be supported by the community.

His former colleagues will use his tractor to keep his contracting business going, which will provide an income for his wife and young son.

"Now, just look after his family and young Levi especially, he's a fantastic kid and Duncan would want him still doing everything that he used to do," Mr Monk said.