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: 5/21/2024Network: CBeebiesStatus: Continuing
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Blue Whale Rescue
star
10.00
1 votes

#1 - Blue Whale Rescue

Season 5 - Episode 2 - Aired 3/28/2023

When Kwazii discovers a blue whale with an injured tail, the Octonauts attempt to use a giant net and Octofloats to keep it from sinking. Meanwhile, Peso and Tweak collaborate on a special brace for its tail, and Kwazii, Dashi and Shellington try to find it enough food. But when the supporting net breaks, the Octonauts have to launch an emergency free-fall rescue!

Watch Now:Amazon
Blue Fin Tuna
star
10.00
1 votes

#2 - Blue Fin Tuna

Season 5 - Episode 1 - Aired 3/27/2023

After an encounter with a school of migrating tuna, the Octonauts discover that one of the speedy fish, Tina, has been left behind. And she’s injured! Poor Tina has a hook stuck in her mouth and is too weak to swim. After Peso tends to her wound, the Octonauts agree to help get her to the tuna spawning grounds. But they’ll have to be quick: egg-laying season doesn’t last long. Luckily, Tweak’s latest gup, the Gup-R, is the fastest she’s ever built! The Octonauts use it to tow Tina, but when the Gup-R’s battery dies, how will they catch up to the rest of her school?

Feeding Frenzy
star
10.00
1 votes

#3 - Feeding Frenzy

Season 5 - Episode 5 - Aired 3/31/2023

While exploring a reef, Shellington and Dashi accidentally trigger a feeding frenzy with multiple sharks biting at anything that moves. As Barnacles and Tweak work frantically to plan a rescue, Shellington and Dashi try not to become shark food!

Whales of Mystery
star
10.00
1 votes

#4 - Whales of Mystery

Season 5 - Episode 3 - Aired 3/29/2023

Shellington is excited to find the distinctive tooth of a very rare creature, the spade-toothed beaked whale. Now, the Octonauts must find the tooth’s owner, so Shellington can study it, and so that Peso can help replace its tooth. But it won’t be easy: spade-toothed beaked whales like to be left alone and can dive very deep.

Watch Now:Amazon
The Kelp Monster Mystery
star
9.00
4 votes

#5 - 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.

Watch Now:Amazon
The Dwarf Lantern Shark
star
8.71
48 votes

#6 - 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 Coconut Crabs
star
8.35
74 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.

The Eel Ordeal
star
8.28
70 votes

#8 - 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.

The Sea Snakes
star
8.20
74 votes

#9 - 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.

The Dolphin Reef Rescue
star
8.08
73 votes

#10 - 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.

The Sunfish
star
8.00
1 votes

#11 - 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.

The Tiger Shark
star
8.00
2 votes

#12 - The Tiger Shark

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

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

Ghost Ship
star
8.00
2 votes

#13 - Ghost Ship

Season 5 - Episode 4 - Aired 3/30/2023

The Octonauts follow a trail of deep-sea debris to its source: a derelict ship floating unmanned on the surface. But the ship seems to be haunted by ghostly voices, which a quick dip below the water line reveals to be hundreds of barnacles stuck to the ship. As the ship drifts into waters too cold for the barnacles, the Octonauts must find a way to tow it to warmer waters before it sinks or falls apart.

Watch Now:Amazon
The Arctic Orcas
star
7.93
105 votes

#14 - 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.

The Sea Pigs
star
7.88
17 votes

#15 - 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 Cone Snail
star
7.87
15 votes

#16 - 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.

The Jellyfish Bloom
star
7.82
107 votes

#17 - 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.

The Waterbears
star
7.81
32 votes

#18 - 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.

Operation Cooperation
star
7.80
5 votes

#19 - 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 Kelp Forest Rescue
star
7.79
73 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.

The Baby Gator
star
7.74
23 votes

#21 - 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:Amazon
The Giant Kelp Forest
star
7.73
117 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.

star
7.67
9 votes

#23 - Loggerhead Sea Turtle

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

Barnacles seeks guidance from a mysterious sea turtle.

The Oarfish
star
7.65
141 votes

#24 - The Oarfish

Season 1 - Episode 32 - Aired 12/14/2010

Dashi snaps a picture of what appears to be a sea serpent, but the truth is stranger than fiction when it turns out to be an awesomely long Oarfish.

The Snot Sea Cucumber
star
7.62
173 votes

#25 - The Snot Sea Cucumber

Season 1 - Episode 20 - Aired 10/29/2010

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!