The Octonauts travel to Professor Inkling's childhood home in an undersea mountain for Christmas.
The Octonauts cheer Peso on as he goes home to compete against an awesomely athletic penguin in an annual tournament: the Iron Clam Competition.
When Kwazii gets lost at sea aboard the tiny Octo-ski, he meets a family of sea skaters. Kwazii and Dashi become entangled in a strange deep-sea creature known as a Siphonophore.
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