Normally it is great white sharks that are considered the most feared and apex predator of the ocean.
However, stunning footage thought to be a "world's first" shows a pod of three orcas, more commonly known as killer whales, tearing into a great white as the sea around it fills with blood.
The video forms part of Discovery Channel's Shark Week, an annual TV event that it now in its 34th year, on an episode called Shark House.
