A humpback whale calf breaches in front of National Geographic photographer and producer BrianSkerry in Tonga. Brian was here to document the relationships between humpback moms and calfs. The Disney+ original series "Secrets of the Whales," from NatGeo, is now streaming on DisneyPlus. A book of the same name is on sale now wherever books are sold, and the story is featured on the cover of the May 2021 issue of the magazine, the Ocean Issue, available online now. Learn more about all three at Nat Geo's Planet Possible hub, our newest initiative, which aims to inform, inspire, and enable consumers to live more lightly on the planet: natgeo.com/planet. Footage by stevedeneef. Follow BrianSkerry to keep up with all things #SecretsOfTheWhales. #DisneyPlus