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 ...

Barnacles and Kwazii investigate a disruption on a nearby reef: a Carrier Crab and the Urchin who lives on its shell just can't seem to get along.

Animated deep sea adventures. The Octonauts head to the kelp forest to visit Shellington's sister Pearl and her newborn son Periwinkle.