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.

When a huge Orca whale becomes stranded on a beach, Captain Barnacles and the Octonauts devise a plan to pull him back into the water, with some help from a group of tunnelling fiddler crabs.