The Octonauts identify a mysterious creature that turns out to be a spider crab in need.

Red Rock Crabs: When Shellington and the crew try to gather some skittish crabs who have drifted away from home, they get help from some old friends. Sea Pigs: The Octonauts must stop a huge herd of ...

Calico Jack and Kwazii team up with a sneaky cat to find buried treasure.

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