Captain Barnacles and his intrepid band of explorers roam the oceans in search of adventure and fun. Whether it's a perilous voyage to the bottom of the sea or the piratey pursuit of a giant squid, the Octonauts leap into action and always prove that eight heads are better than one.
Dashi teams up with her little sister, Koshi, to solve a mysterious disappearance in a kelp forest.
Down in the darkness of the ocean deep, Peso and the Octonauts must help a tiny, injured Dwarf Lanternshark. But they have to find him first!
The Octonauts travel up a treacherous river to help a young migrating eel on her difficult journey.
When the Octonauts all pitch in to help save a sick coral reef, they get some unexpected help from a pod of playful dolphins.
Kwazii adopts a baby alligator, but when it escapes the Octopod, he must rescue the tiny creature from ocean currents and hungry predators.
The Octonauts wade through a swamp to find a lost flamingo chick before hungry predators do!
The young Tiger Star is hungry and willing to eat anything or anyone.
When Captain Barnacles and Peso get lost in the icy Arctic sea, a pod of Orcas help the Octonauts find them.
When Shellington gets trapped in the middle of a massive Jellyfish bloom, it's up to the Octonauts to rescue him.
When Peso's little brother, Pinto, comes to visit, he's more interested in being a pirate than a medic – at least until he accompanies Peso on a mission to rescue Dashi and Shellington in a kelp forest.
The gang ventures into a red-hot lava tube to rescue a tiny water bear that does not seem to mind the heat at all.
When Kwazii's favorite sub, the Gup B, goes missing, the Octonauts journey into a mysterious kelp forest to find it, meeting strange and interesting creatures along the way.
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