When a hungry tiger shark eats the camera that Tweak's turtle friend Sandy gets in the Octopod, she and the Octonauts must rescue her before it eats everything in its path. When a huge sunfish enters ...

When red-hot volcanoes start a chain reaction of disasters across the ocean, the Octonauts must work together to face their biggest challenge yet.

The Octonauts follow a trail of deep-sea debris to its source: a derelict ship floating unmanned on the surface. But the ship seems to be haunted by ghostly voices, which a quick dip below the water ...