Marine biologists in Australia tagged humpback whales with underwater cameras during their seasonal migration to understand how fish who hitch rides on the whales live their lives—and show us just what it’s like to be along for the trip. The footage shows how mutually beneficial the relationship is between the whales and the suckerfish, or remoras, that make a home on the marine mammal’s skin. Remarkably, the experts found, the remoras can “move around freely and keep returning to the whale’s bo