A video has emerged from South Africa of a seal chasing a great white shark.

The bizarre role reversal was caught on camera by the crew of a cage diving boat off the coast of Mossel Bay earlier this month.

In the clip, the filmer jokes that they are going to name the tough seal "Chuck Norris."

A light hearted video of a thug seal who earned his nick name "Chuck Norris". At one point he was seen following some white sharks around the boat which seemed to make them uneasy. Just goes to show that there is never a dull moment on a shark diving vessel in Mossel Bay South Africa. Videos like these make it easy to see that White Sharks are not the mindless killers they are made out to be. Thanks to our interns Mark, Ewan and Harry for the commentary.