The Octonauts
All
2010
Kids & Family
Little Learners

The Mariana Trench Adventure

Season 3, Episode 12

: Tweak has designed a brand-new Deep Sea Station to study the deepest, darkest reaches of the ocean, but the Octonauts face multiple challenges.

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The Octonauts
About the Series

The Octonauts

The Octonauts are a team of adventurers who explore the world's oceans, rescue aquatic creatures and protect their habitats.

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The Water Bears / The Barracudas
1. The Water Bears / The Barracudas

The Octonauts go into a red-hot lava tube to rescue a water bear! Shellington an...

The Cone Snails / The Artificial Reef
2. The Cone Snails / The Artificial Reef

Only Peso can save the day when a cone snail invades the Octopod. An underwater ...

The Humpback Whales / The Duck-billed Platypus
3. The Humpback Whales / The Duck-billed Platypus

A humpback whale helps Kwazii track down the key to a treasure chest. Then, the ...

The Mudskippers / The Immortal Jellyfish
4. The Mudskippers / The Immortal Jellyfish

The Octonauts attempt to keep the peace amongst a trio of mudskippers. Then, She...

The Sea Skaters / The Siphonophore
5. The Sea Skaters / The Siphonophore

Kwazii gets lost at sea and meets a flotilla of tiny sea skaters. Kwazii and Das...

The Urchin Invasion / The Lion's Mane Jellyfish
6. The Urchin Invasion / The Lion's Mane Jellyfish

The Octonauts visit Shellington's sister, Pearl, and her newborn son Periwinkle....

The Pelicans / The Hammerhead Sharks
7. The Pelicans / The Hammerhead Sharks

The Octonauts and the birds work together to clean up a floating garbage patch. ...

The Red Rock Crabs / The Sea Pigs
8. The Red Rock Crabs / The Sea Pigs

Shellington and the crew try to gather some skittish crabs. The Octonauts must s...

The Sea Sponge / The Loggerhead Sea Turtle
9. The Sea Sponge / The Loggerhead Sea Turtle

A sea sponge suffers from a mysterious illness. An underwater tremor separates t...

The Harbor Seal / The Yeti Crabs
10. The Harbor Seal / The Yeti Crabs

The Octonauts enlist a unique undersea detective when Peso's patient mysteriousl...

The Great Arctic Adventure
11. The Great Arctic Adventure

The Octonauts take a vacation, and Peso accompanies Barnacles to help his sister...

The Mariana Trench Adventure
12. The Mariana Trench Adventure

Tweak has designed a brand-new Deep Sea Station to study the deepest, darkest re...

The Over Under Adventure
13. The Over Under Adventure

The Octonauts mission to explore Antarctica becomes a desperate rescue as a grou...

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