A male humpback whale's courtship strategy can be pretty aggressive, even sometimes resulting in a fight to the death for a potential partner. So this little one has to be under a mother's watchful eye to stay safe. Spy in the Ocean is available on iPlayer in the UK and will be available on PBS in the US in the autumn. Subscribe: http://bit.ly/BBCEarthSub #HumpbackWhale #AnimalRobots #SpyInOcean Watch more: Planet Earth http://bit.ly/PlanetEarthPlaylist Blue Planet http://bit.ly/BluePlanetPlaylist Planet Earth II http://bit.ly/PlanetEarthIIPlaylist Planet Dinosaur https://bit.ly/PlanetDinosaurPlaylist 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 entertaining and thought-provoking natural history content. Dramatic, rare, and exclusive, nature doesn't get more exciting than this. This is a commercial page from BBC Studios. Service information and feedback: http://bbcworldwide.com/vod-feedback--contact-details.aspx