'Killer whale' attacks sharks

Now forget Frozen Planet, how about this for some amazing wildlife footage!

This amateur video is believed to show a killer whale attacking a group of sharks in New Zealand.

Killer whales spend up to 60% of their lives looking and hunting for food, but are very rarely sen attacking sharks.

Eyewitness David Evans said he was told there were whales in the area - so he headed down to the beach with a camera.

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