Octonauts
Follows an underwater exploring crew made up of stylized anthropomorphic animals, a team of eight adventurers who live in an undersea base, the Octopod, from where they go on undersea adventures with the help of a fleet of aquatic vehicles.
Season 3 · Episode 18 ·
The Urchin Invasion
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!
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Episode 18 of season 3 of Octonauts: “The Urchin Invasion”. Aired 2014-03-21. Watch it online free on ZapFlix.