Amazing aerial footage captured off the coast of the Mercury Islands shows orca hunting for stingray in the shallows.
Tauranga wildlife photographer Jack Preston was diving with friends on Sunday when two orca "appeared out of nowhere".
Using a drone, Preston followed the mammals as they hunted for stingray among the seaweed near the islands' shoreline.
The Mercury Islands are about 8km off the coast of the Coromandel.
"It's a real once-in-a-lifetime opportunity," Preston said.