Every day with the Octonauts is an exciting opportunity to embark on a new mission.When the Octopod breaks down, Tweak and the crew search for a missing part aboard an abandoned prototype of the ship, not realising something lives there! In other episodes, Shellington and Kwazii team up with a moray eel and grouper fish, the Octonauts are attacked by bomber worms, and they help the coconut crabs discover who is stealing their coconuts.