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'Killer whales are bullies and humpbacks are bouncers'
Humpback whales are protecting other mammals from orca or killer whales, suggests a new study.
Mark Brownlow is the series producer of ÃÛÑ¿´«Ã½â€™s Ocean: Blue Planet 2.
He has come face to face with killer whales and humpbacks on many occasions while swimming and filming in the ocean.
(Picture: Killer whale Credit: Getty Images)
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