WATCH | Orcas attack great white off the coast of Knysna

Great whites might think they're the top of the food chain, but orcas beg to differ. 

In an amazing video shared by tour guide Donavan Smith, a great white was trapped by a two orcas, which Smith says in the video is hunting it. 

PICS: Where are SA's great white sharks? Right here, says Marine Dynamics

It took place just off the coast of Knysna while Smith was giving a tour.

Orcas are known to target sharks - they like to munch on their livers - and the increased sightings of these killer whales in recent years is theorised to have led to a decrease in great white sightings in Cape Town's False Bay.

However, according to Marine Dynamics in Gansbaai the numbers have picked up again in the region.

Compiled by Gabi Zietsman.