Thanks to their specialised kidneys which can filter out high quantities of salt, whales can drink seawater. But they get most of the water they need from small sea creatures they consume, such as krill. #WorldOceanWeek #EarthCapture by Slater Moore Subscribe: bit.ly/BBCEarthSub #BBCEarth #Shorts #Whales Watch more: Planet Earth bit.ly/PlanetEarthPlaylist Blue Planet bit.ly/BluePlanetPlaylist Planet Earth II bit.ly/PlanetEarthIIPlaylist Planet Dinosaur 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: bbcworldwide.com/vod-feedback--contact-details.aspx