The Octonauts follows a team of adventure heroes who dive right into action whenever there is trouble under the sea. In a fleet of amazing aquatic vehicles, the Octonauts explore incredible new underwater worlds, rescue wonderful sea creatures, and often save the day before returning safely home to the Octopod. Under the leadership of Captain Barnacles Bear, closely flanked by Lieutenant Kwazii Cat and Medic Peso Penguin, the Octonauts are always ready to embark on an exciting new mission! The Octonauts and the Whale Shark The Octoalert is sounded when Dashi gets accidentally swallowed by a whale shark! It's up to Barnacles, Peso and Kwazii to venture inside the huge fish to rescue her. Octonauts, to your stations!