Two killer whales are hunting great white sharks — to eat their livers

A decade ago , great white and sevengill sharks ruled False Bay next to Cape Town on the southwestern edge of South Africa .

In 2009 , tourism boats started documenting the arrival of killer whales known as Port and Starboard .

The killer whales have been documented preying on sharks in the area.

They create near-surgical cuts in great whites’ underbellies, removing their livers and leaving them to die.

A pair of killer whales were spotted for the first time in 2012 at the far south end of False Bay near the Cape of Good Hope .

They showed up in the bay again in January 2015 and were spotted multiple times there over the next 10 months .

Marine biologists found bite marks on the sharks’ pectoral fins and bruising of the underlying tissue.

They reexamined photographs of the sharks that had been killed five months earlier .

The effects of Port and Starboard ’s decade -long hunting campaign have been pronounced and enduring.

About 70 percent of sharks face serious pressure from overfishing, which is rampant and off the radar in southern Africa .