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Octonauts

Season 3, episode 18. This player now records resume state for the active profile so browse, account, and detail pages can bring you back here quickly.

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S3 E18

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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Season 3

Back to series detail

Episode 1: The Siphonophore

Episode 2: The Water Bears

Episode 3: The Cone Snail

Episode 4: The Artificial Reef

Episode 5: The Humpback Whales

Episode 6: The Pelicans

Episode 7: The Sea Pigs

Episode 8: The Yeti Crab

Episode 9: The Barracudas