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E1 Octonauts and the Poison Dart Frogs
When a giant wave hurls Amazon River creatures up into the trees, the Octonauts must get them down safely, without disturbing poison dart frogs who live there.
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E2 Octonauts and the Hidden Lake
The Octonauts are exploring Antarctica, when Shellington discovers strange microscopic creatures living under the ice.
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E3 Octonauts and the Octopod Mystery
When the Octopod breaks down, Tweak and the crew search for a missing part aboard an abandoned prototype of the ship, not realising something lives there.
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E4 Octonauts and the Baby Sea Turtles
As newborn baby sea turtles make their way to the ocean, the Octonauts must steer them clear a giant wave and hungry predators.
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E5 Octonauts and the Walrus Pups
Captain Barnacles and his niece and nephew, Ursa and Orson, must rescue walrus pups who are stranded on a runaway ice floe, before it collides with a huge iceberg!
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E6 Octonauts and the Mantis Shrimp
The Octonauts must get 2 mantis shrimp to stop fighting before their powerful claw strikes destroy the Octopod.
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E7 Octonauts and the Loneliest Whale
The Octonauts follow a strange song to a lonely humpback whale.
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E8 Octonauts and the Tree Lobsters
When a storm washes Peso onto a mysterious, rocky island, he meets a band of lobster-like insects thought to be extinct.
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E9 Octonauts and the Convict Fish
The Octonauts evacuate the creatures living around a reef before a large archway collapses, but one stubborn convict fish refuses to move from her burrow.
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E10 Octonauts and the Emperor Penguins
The Octonauts journey across a dangerous expanse of ice to help a penguin mother get back to her family.
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E11 Octonauts and the Crawfish
When a population of crawfish is stricken by illness, the Octonauts race to find a cure.
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E12 Octonauts and the Flamingos
The Octonauts find a lost flamingo chick separated from his family and they have to return him there before hungry alligators do!
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E13 Octonauts and the Tiger Shark
When a hungry tiger shark eats the camera that Tweak's turtle friend Sandy gets in the Octopod, she and the Octonauts must rescue her before it eats everything in its path.
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E14 Octonauts and the Sunfish
When a huge sunfish enters the GUP-E, Peso and Kwazii must somehow get the large fish out of the Gup. Eventually they find out it's a Sunfish a fish with no fins.
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E15 Octonauts and the Coelacanth
While exploring a dark and spooky cave, The Octonauts find a strange fossil of a powerful prehistoric fish... but it may be more than just a fossil!
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E16 Octonauts and the Surfing Snails
When surfing snails are swept out to sea, it's up to Dashi and the Octonauts to save them.
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E17 Octonauts and the Yellow Bellied Sea Snakes
When Peso gets stranded on a beach with a mass of poisonous snakes after a terrible storm, he and the Octonauts must somehow get them back to the ocean.
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E18 Octonauts and the Hippos
Trying to return home from a mission along an African river, the Octonauts have trouble getting past a gang of large, mud-splatting, territorial hippos.
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E19 Octonauts and Operation Cooperation
After Shellington crashes the GUP-D for the 3rd time, he and Kwazii team up with moray eels and grouper fish to help pick up the pieces and fix the vehicle before daylight occurs.
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E20 Octonauts and the Bomber Worms
While diving down to the Midnight Zone, the Octonauts are attacked by bomber worms.
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E21 Octonauts and the Kelp Monster Mystery
Dashi teams up with her little sister Koshi to help the Octonauts solve a mysterious disappearance in the Kelp Forest. This is the second episode in which is unknown who sounded the Octo-Alert.
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E22 Octonauts and the Coconut Crisis
Kwazii takes a vacation on Coconut Island where he gets hit by some coconuts. Then he and the Octonauts must help their old friends the Coconut Crabs discover who's stealing all their coconuts.
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E23 Octonauts and the Baby Gator
Kwazii adopts a baby alligator naming him Nipper, but when it escapes the Octopod, he and the Octonauts must rescue him.
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E24 Octonauts and the Spinner Dolphins
The Octonauts struggle to save a pod of spinner dolphins who seem to be just swimming in their sleep.