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Octonauts
Season 4 • Episode 21 • Octonauts and the Kelp Monster Mystery
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Octonauts Season 4, Episode 21: 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. Watch Octonauts Season 4, Episode 21 Octonauts and the Kelp Monster Mystery in HD free online. Enjoy high-quality streaming of Octonauts Season 4, Episode 21 and share your thoughts in the comments below!
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Episodes
24 episodes
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.
11 min
Octonauts and the Hidden Lake
The Octonauts are exploring Antarctica, when Shellington discovers strange microscopic creatures living under the ice.
11 min
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.
11 min
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.
11 min
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!
11 min
Octonauts and the Mantis Shrimp
The Octonauts must get 2 mantis shrimp to stop fighting before their powerful claw strikes destroy the Octopod.
11 min
Octonauts and the Loneliest Whale
The Octonauts follow a strange song to a lonely humpback whale.
11 min
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.
11 min
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.
11 min
Octonauts and the Emperor Penguins
The Octonauts journey across a dangerous expanse of ice to help a penguin mother get back to her family.
11 min
Octonauts and the Crawfish
When a population of crawfish is stricken by illness, the Octonauts race to find a cure.
11 min
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!
11 min
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.
11 min
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.
11 min
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!
11 min
Octonauts and the Surfing Snails
When surfing snails are swept out to sea, it's up to Dashi and the Octonauts to save them.
11 min
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.
11 min
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.
11 min
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.
11 min
Octonauts and the Bomber Worms
While diving down to the Midnight Zone, the Octonauts are attacked by bomber worms.
11 min
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.
11 min
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.
11 min
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.
11 min
Octonauts and the Spinner Dolphins
The Octonauts struggle to save a pod of spinner dolphins who seem to be just swimming in their sleep.
11 min