The Urchin Invasion
Show: Octonauts --> Season: 3 - Season 3
AirDate: 3/21/2014
Runtime: 11
Voting: 0 (0)

Overview: The Octonauts head to the kelp forest to visit Shellington's sister, Pearl, and her newborn son Periwinkle - only to find the forest endangered by an infestation of kelp-eating urchins!