This is the dramatic moment a huge great white shark sunk its teeth into a diving cage in South Africa.

The astonishing scene, which was captured by Ewan Wilson on a shark dive in Mossel Bay on Sunday, shows the monster fish opening its jaws and repeatedly biting the metal cage.

Crew members can be heard shouting at the shark to try to get it to stop.

"Luckily the animal left the cage and no divers or sharks were hurt," Wilson said.