In a spectacular display of natural predators at work, a video has captured killer whales attacking sharks off New Zealand's south island.
The Orca whale was spotted thrashing the sharks with its tail and herding them towards the shore to force them into shallow waters.
One shark, desperate to escape from the enormous beasts, even beaches itself on the sand.
It is seen desperately flapping around in a bid to escape the whales, which were unable to move onto the sand.
The incredible feeding frenzy was captured on film by residents who said they had never seen a display of such aggression from the orcas.
Eyewitness David Evans said he was told there were whales in the area and raced to the beach to record the spectacle.
'We all piled in the truck and grabbed a camera, grabbed the video and went down to the beach and just started shooting,' Mr Evans told 3News in New Zealand.
It is thought that there were around six whales and six sharks in the water. Although one of the sharks had a nasty gash to its side, it's not known if the whales managed to catch their dinner.
'That particular injured shark had been beaten up by the orcas,' resident Tracy Thomas told stuff.co.nz.
'There were heaps of sharks just off the beach, swimming in towards the beach then turning around and going back out.'
It is not known what species the attacked sharks were.
