Octonauts

The BEST episodes of Octonauts

Every episode ever - ranked by fan votes!

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.

Last Updated: 5/12/2022Network: CBeebies
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The Dwarf Lantern Shark
star
8.84
49 votes

#1 - The Dwarf Lantern Shark

Season 1 - Episode 44 - Aired 2/3/2011

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 Kelp Monster Mystery
star
8.67
3 votes

#2 - The Kelp Monster Mystery

Season 4 - Episode 17 - Aired 6/4/2016

Dashi teams up with her little sister, Koshi, to solve a mysterious disappearance in a kelp forest.

Operation Cooperation
star
8.50
2 votes

#3 - Operation Cooperation

Season 4 - Episode 16 - Aired 4/4/2016

After Shellington crashes the Gup-D, he and Kwazii team up with a moray eel and grouper fish to pick up the pieces.

Watch Now:Amazon
The Eel Ordeal
star
8.40
72 votes

#4 - The Eel Ordeal

Season 1 - Episode 42 - Aired 2/1/2011

The Octonauts travel up a treacherous river to help a young migrating eel on her difficult journey.

Watch Now:Amazon
The Loggerhead Sea Turtle
star
8.38
8 votes

#5 - The Loggerhead Sea Turtle

Season 3 - Episode 20 - Aired 10/8/2013

When an underwater tremor separates the Gup-X and its crew, Barnacles seeks guidance from a mysterious sea turtle.

Watch Now:Amazon
The Sea Pigs
star
8.27
15 votes

#6 - The Sea Pigs

Season 3 - Episode 7 - Aired 9/12/2013

The Octonauts must stop a huge herd of sea pigs before they march blindly into the Mariana Trench - the deepest point on earth!

Watch Now:AmazoniTunes
The Coconut Crabs
star
8.27
75 votes

#7 - The Coconut Crabs

Season 2 - Episode 3 - Aired 11/21/2012

Kwazii finds a mysterious, unbreakable coconut, so the Octonauts seek out the help of some large, island-dwelling coconut crabs to open it.

Watch Now:AmazoniTunes
The Sea Snakes
star
8.23
75 votes

#8 - The Sea Snakes

Season 2 - Episode 5 - Aired 11/23/2012

It's Sea Snakes on an Octopod when a poisonous sea krait lays her eggs in the garden pod, just as Captain Barnacles has to navigate the ship past a treacherous whirlpool.

Watch Now:AmazoniTunes
The Dolphin Reef Rescue
star
8.19
75 votes

#9 - The Dolphin Reef Rescue

Season 1 - Episode 41 - Aired 1/31/2011

When the Octonauts all pitch in to help save a sick coral reef, they get some unexpected help from a pod of playful dolphins.

Watch Now:Amazon
The Cone Snail
star
8.13
15 votes

#10 - The Cone Snail

Season 3 - Episode 3 - Aired 9/6/2013

Peso sets out to save the day when a cone snail invades the octopod and picks off the crew one by one with its dangerous harpoons.

Watch Now:AmazoniTunes
The Arctic Orcas
star
8.00
108 votes

#11 - The Arctic Orcas

Season 1 - Episode 37 - Aired 1/25/2011

When Captain Barnacles and Peso get lost in the icy Arctic sea, a pod of Orcas help the Octonauts find them.

Watch Now:Amazon
The Hippos
star
8.00
2 votes

#12 - The Hippos

Season 4 - Episode 22 - Aired 6/9/2016

Returning home from Africa, the Octonauts encounter a gang of large, territorial hippos.

Watch Now:Amazon
The Coelacanth
star
8.00
2 votes

#13 - The Coelacanth

Season 4 - Episode 20 - Aired 6/7/2016

While exploring a dark and spooky cave, the Octonauts discover the fossil of a powerful, prehistoric fish... but it may be more than just a fossil.

Watch Now:Amazon
The Spinner Dolphins
star
8.00
1 votes

#14 - The Spinner Dolphins

Season 4 - Episode 23 - Aired 6/13/2016

Watch Now:Amazon
The Sunfish
star
8.00
1 votes

#15 - The Sunfish

Season 4 - Episode 24 - Aired 6/14/2016

Join Captain Barnacles and his intrepid band of explorers, The Octonauts, for more deep sea adventures. The Octonauts 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. The Octonauts must help a giant sunfish who can't swim straight, before it hurts other sea creatures and itself.

Watch Now:Amazon
The Tiger Shark
star
8.00
2 votes

#16 - The Tiger Shark

Season 4 - Episode 21 - Aired 6/8/2016

The young Tiger Star is hungry and willing to eat anything or anyone.

Watch Now:Amazon
The Hidden Lake
star
7.95
39 votes

#17 - The Hidden Lake

Season 4 - Episode 2 - Aired 9/24/2015

The Octonauts are exploring Antarctica, when Shellington discovers strange microscopic creatures living under the ice.

Watch Now:AmazoniTunes
The Yeti Crab
star
7.92
13 votes

#18 - The Yeti Crab

Season 3 - Episode 8 - Aired 9/13/2013

As Tweak tests the Gup-X deep down in the Midnight Zone, a yeti crab damages the ship, endangering itself and the Octonauts.

Watch Now:AmazoniTunes
The Baby Gator
star
7.91
23 votes

#19 - The Baby Gator

Season 4 - Episode 11 - Aired 3/14/2016

Kwazii adopts a baby alligator, but when it escapes the Octopod, he must rescue the tiny creature from ocean currents and hungry predators.

Watch Now:iTunes
The Kelp Forest Rescue
star
7.88
75 votes

#20 - The Kelp Forest Rescue

Season 1 - Episode 24 - Aired 11/4/2010

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.

Watch Now:AmazoniTunes
The Jellyfish Bloom
star
7.88
108 votes

#21 - The Jellyfish Bloom

Season 1 - Episode 34 - Aired 12/16/2010

When Shellington gets trapped in the middle of a massive Jellyfish bloom, it's up to the Octonauts to rescue him.

Watch Now:Amazon
The Giant Kelp Forest
star
7.79
118 votes

#22 - The Giant Kelp Forest

Season 1 - Episode 15 - Aired 10/22/2010

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.

Watch Now:AmazoniTunes
The Urchin Invasion
star
7.77
13 votes

#23 - The Urchin Invasion

Season 3 - Episode 18 - Aired 3/21/2014

The Octonauts head to the kelp forest to visit Shellington's sister, Pearl, and her newborn son Periwinkle - only to find the forest endangered by an infestation of kelp-eating urchins!

Watch Now:Amazon
The Emperor Penguins
star
7.75
16 votes

#24 - The Emperor Penguins

Season 4 - Episode 10 - Aired 12/16/2015

The Octonauts journey across a dangerous expanse of ice to help a penguin mother get back to her family.

Watch Now:AmazoniTunes
The Pelicans
star
7.71
17 votes

#25 - The Pelicans

Season 3 - Episode 6 - Aired 9/11/2013

When a floating garbage patch endangers a flock of pelicans and other sea creatures, the Octonauts and the birds work together to clean it up.

Watch Now:AmazoniTunes