The BEST Episodes of Octonauts

Every episode ever - ranked by fan votes!

Last Updated: Sep 8, 2020

Network: Netflix

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 - Aired Jun 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.

star 10.00
1 votes
The Octonauts and the Chinese Giant Salamander

#2 - The Octonauts and the Chinese Giant Salamander

Season 5 - Episode 1 - Aired Dec 3, 2018

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 - Aired Dec 4, 2018

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

star 10.00
1 votes
The Dwarf Lantern Shark

#4 - The Dwarf Lantern Shark

Season 1 - Episode 44 - Aired Feb 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!

star 8.87
48 votes
Writers: Stephanie Simpson
The Kelp Monster Mystery

#5 - The Kelp Monster Mystery

Season 4 - Episode 17 - Aired Jun 4, 2016

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

star 8.67
3 votes
The Surfing Snails

#6 - The Surfing Snails

Season 4 - Episode 14 - Aired Mar 22, 2016

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 8.50
2 votes
Writers: Stephanie Simpson
Operation Cooperation

#7 - Operation Cooperation

Season 4 - Episode 16 - Aired Apr 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.

star 8.50
2 votes
The Eel Ordeal

#8 - The Eel Ordeal

Season 1 - Episode 42 - Aired Feb 1, 2011

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

star 8.40
72 votes
Writers: Stephanie Simpson
The Loggerhead Sea Turtle

#9 - The Loggerhead Sea Turtle

Season 3 - Episode 20 - Aired Oct 8, 2013

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

star 8.38
8 votes
The Cone Snail

#10 - The Cone Snail

Season 3 - Episode 3 - Aired Sep 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.

star 8.29
14 votes
The Coconut Crabs

#11 - The Coconut Crabs

Season 2 - Episode 3 - Aired Nov 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.

star 8.27
73 votes
The Sea Pigs

#12 - The Sea Pigs

Season 3 - Episode 7 - Aired Sep 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!

star 8.27
15 votes
The Sea Snakes

#13 - The Sea Snakes

Season 2 - Episode 5 - Aired Nov 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.

star 8.26
74 votes
The Dolphin Reef Rescue

#14 - The Dolphin Reef Rescue

Season 1 - Episode 41 - Aired Jan 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.

star 8.19
75 votes
Writers: Stephanie Simpson
The Arctic Orcas

#15 - The Arctic Orcas

Season 1 - Episode 37 - Aired Jan 25, 2011

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

star 8.00
108 votes
Writers: Stephanie Simpson
The Baby Gator

#16 - The Baby Gator

Season 4 - Episode 11 - Aired Mar 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.

star 8.00
22 votes
Writers: Stephanie Simpson
The Hippos

#17 - The Hippos

Season 4 - Episode 22 - Aired Jun 9, 2016

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

star 8.00
2 votes
The Spinner Dolphins

#18 - The Spinner Dolphins

Season 4 - Episode 23 - Aired Jun 13, 2016

star 8.00
1 votes
The Sunfish

#19 - The Sunfish

Season 4 - Episode 24 - Aired Jun 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.

star 8.00
1 votes
The Tiger Shark

#20 - The Tiger Shark

Season 4 - Episode 21 - Aired Jun 8, 2016

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

star 8.00
2 votes
The Hidden Lake

#21 - The Hidden Lake

Season 4 - Episode 2 - Aired Sep 24, 2015

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

star 7.95
39 votes
The Yeti Crab

#22 - The Yeti Crab

Season 3 - Episode 8 - Aired Sep 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.

star 7.92
13 votes
The Urchin Invasion

#23 - The Urchin Invasion

Season 3 - Episode 18 - Aired Mar 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!

star 7.92
12 votes
The Kelp Forest Rescue

#24 - The Kelp Forest Rescue

Season 1 - Episode 24 - Aired Nov 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.

star 7.88
75 votes
Writers: Stephanie Simpson
The Jellyfish Bloom

#25 - The Jellyfish Bloom

Season 1 - Episode 34 - Aired Dec 16, 2010

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

star 7.88
108 votes
Writers: Stephanie Simpson