The BEST Episodes of Octonauts

Every episode ever - ranked by fan votes!

Last Updated: Sep 13, 2019

Network: CBeebies

Animated deep sea adventure series. 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.

The Coelacanth

#1 - The Coelacanth

Season 4 - Episode 20

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.

star 10.00
1 votes
The Octonauts and the Chinese Giant Salamander

#2 - The Octonauts and the Chinese Giant Salamander

Season 5 - Episode 1

The Octonauts head to the Yangtze River to help Min the Mapmaker, an old friend of Inkling's, who's been trapped by a mysterious creature. Turns out, It was just a Chinese giant salamander protecting it's precious eggs, which have fallen ill due to rising water temperatures.

star 10.00
1 votes
Octonauts and the Scaly-Foot Snail

#3 - Octonauts and the Scaly-Foot Snail

Season 5 - Episode 2

While out exploring the deep sea hydrothermal vents, Shellington encounters a mysterious creature - a scaly-foot snail.

star 10.00
1 votes
The Surfing Snails

#4 - The Surfing Snails

Season 4 - Episode 14

When surfing snails are swept out to sea by a huge wave, it's up to Dashi and the Octonauts to save them before their bubble rafts pop!

star 9.00
1 votes
Writers: Stephanie Simpson
The Kelp Monster Mystery

#5 - The Kelp Monster Mystery

Season 4 - Episode 17

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

star 9.00
2 votes
The Loggerhead Sea Turtle

#6 - The Loggerhead Sea Turtle

Season 3 - Episode 20

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

star 8.50
6 votes
Operation Cooperation

#7 - Operation Cooperation

Season 4 - Episode 16

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

star 8.50
2 votes
The Great Penguin Race

#8 - The Great Penguin Race

Season 1 - Episode 51

Animated deep sea adventure series. Captain Barnacles and his intrepid band of explorers roam the oceans in search of adventure and fun. The Octonauts cheer Peso on as he goes home to compete against an awesomely athletic penguin in an annual tournament - the Iron Clam Competition.

star 8.40
5 votes
The Sea Pigs

#9 - The Sea Pigs

Season 3 - Episode 7

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

star 8.25
12 votes
The Cone Snail

#10 - The Cone Snail

Season 3 - Episode 3

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.

star 8.17
12 votes
The Eel Ordeal

#11 - The Eel Ordeal

Season 1 - Episode 42

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

star 8.12
17 votes
Writers: Stephanie Simpson
The Narwhal

#12 - The Narwhal

Season 1 - Episode 17

While exploring the Arctic, the Octopod gets trapped in the ice. Only Barnacles's skillful navigation, and the help of a friendly Narwhal, can get them free.

star 8.12
34 votes
Writers: Stephanie Simpson
The Arctic Orcas

#13 - The Arctic Orcas

Season 1 - Episode 37

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

star 8.08
26 votes
Writers: Stephanie Simpson
The Snot Sea Cucumber

#14 - The Snot Sea Cucumber

Season 1 - Episode 20

When a slimy, slippery snot sea cucumber gets loose on the Octopod, Captain Barnacles Bear decides the only way to save it is to flood the ship!

star 8.03
37 votes
Writers: Stephanie Simpson
The Enemy Anemones

#15 - The Enemy Anemones

Season 1 - Episode 16

The Octonauts and some helpless crabs are caught between two territorial groups of aggregating anemones - and their numbers are growing!

star 8.01
34 votes
Writers: Stephanie Simpson
The Yeti Crab

#16 - The Yeti Crab

Season 3 - Episode 8

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

star 8.00
10 votes
The Hidden Lake

#17 - The Hidden Lake

Season 4 - Episode 2

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

star 8.00
37 votes
The Flamingos

#18 - The Flamingos

Season 4 - Episode 15

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

star 8.00
1 votes
Writers: Stephanie Simpson
The Hippos

#19 - The Hippos

Season 4 - Episode 22

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

star 8.00
1 votes
The Sunfish

#20 - The Sunfish

Season 4 - Episode 24

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.

star 8.00
1 votes
The Tiger Shark

#21 - The Tiger Shark

Season 4 - Episode 21

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

star 8.00
1 votes
The Giant Whirlpool

#22 - The Giant Whirlpool

Season 1 - Episode 21

The Octonauts race against time to rescue Tweak's pal, a leatherback sea turtle who's caught in a fast-moving ocean current that's sucking it into a whirlpool.

star 7.94
35 votes
Writers: Stephanie Simpson
The Baby Gator

#23 - The Baby Gator

Season 4 - Episode 11

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

star 7.90
20 votes
Writers: Stephanie Simpson
The Colossal Squid

#24 - The Colossal Squid

Season 2 - Episode 1

The Octopod is attacked by a colossal squid, who drags the ship down an abyssal trench, forcing Barnacles and Kwazii to make a perilous swim outside to confront the gigantic beast.

star 7.88
25 votes
The Combtooth Blenny

#25 - The Combtooth Blenny

Season 1 - Episode 33

When Kwazii and Peso are shipwrecked on a desert island, they encounter a Combtooth Blenny - a fish who walks on land! They enlist him to send an SOS message to the other Octonauts.

star 7.86
28 votes
Writers: Stephanie Simpson