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Dogs 'swimming with sharks' on Australia's coastline

21 July 2011 Last updated at 18:10 BST

Sharks are usually considered to be the most fearsome predators along Australia's coastline. But recent footage shows they have some unlikely rivals - dogs.

The footage of the two dogs, called Kerr and Budjerlung, apparently chasing sharks in Western Australia has become an internet sensation.

Andy Moore reports.

Contributors in this piece: Wossy Davey, Dog's owner