The BEST episodes of Octonauts

Every episode of Octonauts ever, ranked from best to worst by thousands of votes from fans of the show. The best episodes of Octonauts!

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: 6/1/2023Network:CBeebies
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The Kelp Monster Mystery
star
9.00
4 votes

#1 - 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
9.00
3 votes

#2 - 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 Dwarf Lantern Shark
star
8.85
47 votes

#3 - 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 Hippos
star
8.67
3 votes

#4 - 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
Loggerhead Sea Turtle
star
8.38
8 votes

#5 - Loggerhead Sea Turtle

Season 3 - Episode 20 - Aired 9/22/2015

Barnacles seeks guidance from a mysterious sea turtle.

Watch Now:Amazon
The Eel Ordeal
star
8.37
69 votes

#6 - 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 Coconut Crabs
star
8.33
73 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 Cone Snail
star
8.29
14 votes

#8 - 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:Amazon
The Sea Pigs
star
8.25
16 votes

#9 - 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:Amazon
The Sea Snakes
star
8.20
74 votes

#10 - 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
8.16
72 votes

#11 - 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 Baby Gator
star
8.00
22 votes

#12 - 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 Flamingos
star
8.00
4 votes

#13 - The Flamingos

Season 4 - Episode 15 - Aired 4/4/2016

The Octonauts wade through a swamp to find a lost flamingo chick before hungry predators do!

Watch Now:Amazon
The Coelacanth
star
8.00
2 votes

#14 - 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

#15 - The Spinner Dolphins

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

The Octonauts struggle to save a pod of spinner dolphins who seem to be swimming in their sleep.

Watch Now:Amazon
The Sunfish
star
8.00
1 votes

#16 - The Sunfish

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

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

#17 - 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 Arctic Orcas
star
7.99
104 votes

#18 - 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 Yeti Crab
star
7.92
13 votes

#19 - 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:Amazon
The Jellyfish Bloom
star
7.88
106 votes

#20 - 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 Kelp Forest Rescue
star
7.88
72 votes

#21 - 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:Amazon
The Waterbears
star
7.81
32 votes

#22 - The Waterbears

Season 3 - Episode 2 - Aired 9/5/2013

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.

The Hidden Lake
star
7.80
35 votes

#23 - 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 Giant Kelp Forest
star
7.78
116 votes

#24 - 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:Amazon
The Urchin Invasion
star
7.77
13 votes

#25 - 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

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