When her calf risks being crushed by males battling for a mate, a mother whale needs to fight back.
Subscribe: http://bit.ly/BBCEarthSub

Watch more videos from BBC Earth:
Planet Earth http://bit.ly/PlanetEarthPlaylist
Blue Planet http://bit.ly/BluePlanetPlaylist
Planet Earth II http://bit.ly/PlanetEarthIIPlaylist
Planet Dinosaur http://bit.ly/PlanetDinoPlaylist

Check out the other two channels in our BBC Earth network:
BBC Earth Unplugged: http://bit.ly/BBCEarthUnplugged
BBC Earth Lab: http://bit.ly/BBCEarthLabYouTubeChannel

Atlantic: Wildest Ocean on Earth
Discover the mysteries of the Atlantic ocean in all its moods, from its darkest depths to its coastline and islands, and learn about the people and wildlife whose lives are shaped by its rhythms. The Atlantic is an ocean everyone thinks they know, but what we see from the shore is only a fraction of the story. This beautiful and dramatic series takes viewers on a mindblowing journey from north to south, from Africa to Brazil, carried by the currents and blown by the wind for hundreds of thousands of miles, touching countless nations and reaching crushing depths of over 8,000 metres.


Welcome to BBC EARTH! The world is an amazing place full of stories, beauty and natural wonder. Here you'll find 50 years worth of astounding, entertaining, thoughtprovoking and educational natural history content.

This is a commercial channel from BBC Studios. Service & Feedback https://www.bbcstudios.com/contact/co...