The Octonauts create a Mantis Shrimp Robot to save the oceanic creatures from a tsunami and volcanic eruptions in the Pacific Ring of Fire.

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.

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.

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!

When Kwazii gets a case of pirate hiccups, he and Peso go up the river in search of a pirate doctor’s treasure that can cure him.

Kwazii sets off on a monster hunt, and soon encounters a shelled creature called a Nautilus.

The Octonauts must help reunite a grey whale calf with his mother, keeping him well fed in the meantime.

The Octonauts meet a flying squid who can help Kwazii's grandfather, Calico Jack, retrieve his treasure.

When a wave traps Dashi in a cave with an injured sea lion, the Octonauts and sea lion pack must work together to save them. Using just some rope and a life buoy the pack fights against the waves to save them. Can they save them before it is too late?

The Octonauts must guide an ill-stricken hawksbill sea turtle into cooler waters, in order for her to lay healthy eggs.

When Kwazii is found with an injury, he tells the tale of how he and Calico Jack encountered a fish that ate his peg leg.

The Octonauts help a band of algae-shooting sea squirts reunite in order to stop an outbreak in the reef.

When the Vegimals accidentally bring bullfrogs into the Octopod, they must rally them up and bring them back home before the Octonauts find out.

Kwazii and Shellington get lost in the Antarctic’s deep seas, before meeting a family of giant sea spiders who may know a way out.

When the Octo-Bots sink into a lake of boiling hot sulfur, Kwazii has to rescue them before the surface hardens.

Captain Barnacles and Kwazii help a pair of singing female axolotls named George's mom (yellow) and George (pink) find a new watering hole, while protecting them from a hungry flock of herons.

In order for a school of salmon to reach their nesting area, the Octonauts must enlist help from a family of beavers.

The Octolab is being eaten away by a group of zombie worms, tasking the crew with finding a new home for them.

While exploring the Mariana Trench, Shellington and Dashi come across a path full of mud volcanoes and a creature in need.

The Octonauts encounter a tiger fish and blind shrimp who become separated.

The Octonauts help a creature find his louse friend who got lost and could be in trouble.

Shellington’s sister and nephew, Pearl and Periwinkle, join him on a mission.

The Octonauts encounter a blob of glowing liquid drifting on the ocean’s surface.

The crew must catch a mysterious fish that’s out to bite every creature in the reef.

The Octonauts meet strong scaly foot snails and enlist them in trying to help save the Octo-Lab from falling into a crevice.

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 her precious eggs, which have fallen ill due to rising water temperatures.

When Kwazii's Gup-B breaks down in a storm, not even brave Captain Barnacles can save him alone. Fortunately, a chain of reef lobsters lends a hand - and some claws.

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The crew pursues crustaceans who’ve hijacked the Octopod.

When Peso's precious medical kit is taken, Barnacles and Kwazii sneak into a dangerous walrus colony to get it back, disguised as a walrus.

When a school of flying fish accidentally make off with a rare book belonging to Professor Inkling, the Octonauts rig up the Gup B to fly after them and get it back.

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 set out to find and photograph Inkling's long lost cousin, the elusive Giant Squid.

When a huge Orca whale becomes stranded on a beach, Captain Barnacles Bear and the Octonauts devise a plan to pull him back into the water, with some help from a group of tunnelling Fiddler Crabs.

Captain Barnacles and his crew must catch a runaway Octopod, when it is hijacked by a group of crustaceans trying to escape their algae-infested waters.

When Shellington gets lost in a dark sea cave, he gets unexpected assistance from some blind Remipedes.

When all the Gups go out of control, Barnacles and Kwazii leap onto the backs of some speedy Sailfish to round them up.

The Octonauts must evacuate sea creatures before an underwater volcano erupts, but there's one creature that won't budge: a slow moving, gelatinous Blobfish.

The Octonauts follow an old map to what Kwazii believes is treasure guarded by a sea monster but, instead, they meet a playful Octopus with all kinds of surprising abilities.

When the Octonauts find an unusual Sea Star on the beach, they search the ocean from top to bottom (literally) to help find its home.

The Octonauts help out an Albino Humpback Whale with a nasty sunburn.

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.

The Octonauts land on an island for a picnic but must first help some crabs trapped between two warring groups of aggregate anemones. Meanwhile back on the Octopod, a horde of out of control puddings are attacking. Peso wins the contest between 2 types of blobs.

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.

While exploring the deepest part of the ocean, the Midnight Zone, the Octonauts discover a strange rock that happens to be home to a new species of worm.

The Octonauts encounter a snapping shrimp – a small creature that uses its claws to make a big, and stunning, noise.

After an underwater tremor, an injured sea cucumber named Slippy gets loose on the Octopod, so to let her breathe, they flood the ship!

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.

When Captain Barnacles Bear and most of the crew are unable to return to base, it's up to Peso and Tweak to remove a stuck hermit crab from its shell.

When the Octonauts clean and repair their ship, the Octopod, the resulting noise causes a nearby blue whale to act in strange and dangerous ways.

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.

When important objects go missing from their ship, the Octonauts stake out the thief, who turns out to be a decorator crab stealing their things to decorate his shell.

The Octonauts lead a pod of Beluga Whales stuck under the pack ice to safety by getting them to follow Peso while he's playing the same tune as the Beluga's song on his xylophone.

The Octonauts are chased by a whitetip shark only to discover all it really needed was a pilot fish to clean its teeth, and it just so happens that they have just met a lonely pilot fish that is hungry for action.

Peso must gather all his courage when he travels deep down to the very bottom of the ocean, the Midnight Zone, and encounters the mysterious Vampire Squid.

After a storm, the Octonauts help a female seahorse search for her missing mate. She tells them, to Kwazii's surprise, that the missing male seahorse is about to give birth to baby seahorses!

The Octonauts must rescue Peso when he gets trapped inside a giant ctenophore.

The Octonauts cheer Peso on as he goes home to compete against an awesomely athletic penguin in an annual tournament: the Iron Clam Competition.

Some mysterious holes that keep appearing in the Octonauts' equipment turn out to be the work of cookiecutter sharks whose bioluminescence initially made them invisible against the light coming down from the sea surface.

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.

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.

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

When a young dolphin follows Kwazii home, he has to babysit while the other Octonauts search for its mother.

The Octonauts try to pull Peso out of an oceanic trench and get some help from a strange looking creature with a see through head: a Spookfish.

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

Kwazii covets the treasure in a sunken pirate ship, but its protected by slime squirting Slime Eels.

When Peso and the Octonauts aid an enormous Elephant Seal, he overstays his welcome in the Octopod.

The Octonauts must work together as a team to help a lost sardine find her school.

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

The team are preparing for a feast of red seaweed on the Galapagos Islands but a trio of salt-sneezing marine iguanas raid the Octopod and eat it all!

Down in the darkness of the ocean deep, Peso and the Octonauts must help a tiny, injured Dwarf Lantern Shark.

When the Octonauts go on a pirate treasure hunt, Kwazii meets a Parrotfish.

Some electric torpedo rays give the Octopod a jump-start when its batteries go flat during a trip to see Tweak's pal, Sandy the leatherback sea turtle.

Captain Barnacles allows Tunip to use his Octo-compass. But when Tunip loses it, a cuttlefish takes it.

The Octonauts have their hands full as they look after a headstrong young Lemon Shark who's hurt his nose and can't find his way home.

When the Octopod's waterworks are flooded with frightened Humuhumu fish, the Octonauts have to find a way to flush them out.

The octonauts help a 100 year old spider crab which has got its leg trapped in a giant clam whilst en route to its own 100th birthday party. It turns out that Kwazii's afraid of spiders, but he still helps, even though he thought it was a real spider at first.

The Octonauts travel to Professor Inkling's childhood home for Christmas, an undersea mountain. But they discover that a rockslide has endangered the local creatures - including a rare species of golden coral, and Inkling's little octopus nephew, Squirt! With the help of Tweak's latest invention, the Gup X, the Octonauts must rescue the creatures and save Christmas.

When two young leafy sea dragons are accidentally separated from their father and brought onboard the Octopod, the Octonauts must find them before they end up in Kwazii's stew!

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.

While Kwazii and Peso have their hands full babysitting a bunch of Adelie penguin chicks, Captain Barnacles must rescue the chicks' parents from a perilous sea storm!

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

Peso must perform an emergency fin bandage on a hungry great white shark, but first they need to subdue the giant predator using a trick called 'tonic immobility'.

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.

When the Octonauts are unable to rescue a group of Narwhals trapped behind arctic ice, they recruit a Bowhead Whale to help them break through!

A mouth-brooding jawfish father has lost his eggs, and the Octonauts must brave strong currents and other obstacles to help get them back to him!

Barnacles, Kwazii and Peso venture back inside a whale shark to retrieve a Porcupine Puffer Fish that was accidentally swallowed.

The Octonauts help a group of algae-eating fish stand up to some aggressive damselfish, who are harming their own reef by over-farming it with algae.

A timid sperm whale must help the Octonauts release Peso from a giant clam.

In this special episode, the Octonauts travel deep down the Amazon river in search of a lost city - and Kwazii's long lost grandfather, Calico Jack!

Peso and Kwazii venture down to the midnight zone to help a hurt creature, but what they find is a shipwreck 'haunted' by a spooky-looking long-armed squid.

The Octonauts help clean up a beach after a storm, but things get complicated when the resident fiddler crabs hijack the Gup-D!

The Octonauts help a young manta ray find the secret manta ray feeding grounds, but when they finally locate it, the Octonauts become caught in the middle of a dangerous feeding frenzy!

The octonauts discover a rare showing of a full moon as Kwazii discovers that its known as the Pirate Moon as Kwazii and The Octonauts search for a ship that belonged to the pirate king as Kwazii searches for the sword of the Pirate King until a trio of swordfish prevent Kwazii from getting closer to the wrecked ship.

The Octonauts' floating temperature sensors alert them to a risk of waterspouts due to a rise in sea surface temperature so they decide to retrieve the devices for safe-keeping. But Kwazii gets into an argument with a possessive triggerfish which has adopted one of the devices as its home, and they both get carried away by a waterspout. Kwazii ends up having to defend the fish from a seabird and a swordfish that want to eat it. Luckily the characteristic grunting sounds that triggerfish make when distressed enables the other Octonauts to locate them.

The Octonauts recruit a shape-shifting mimic octopus to help them recover an important vial of medicinal algae from a moray eel's lair.

The Octonauts get more than they bargained for when they use the Octopod to transport a pair of invasive lionfish back to their native habitat.

Running out of air, Barnacles struggles to free his paw from the mouth of a giant clam, while simultaneously directing his crew in a delicate manatee rescue operation.

When a gigantic saltwater crocodile wanders into freezing waters, the Octonauts must figure out how to get the predator back to his warm water home - without anyone getting hurt.

Tweak has designed a brand-new Deep Sea Station to study the deepest, darkest reaches of the ocean, but the Octonauts face multiple challenges: from getting it down there, to the extreme environment and strange, prehistoric creatures that greet them once they arrive.

The Octonauts use magnets to try to stop a meteor that's heading toward the Octopod and get an assist from a rock-chomping humphead parrotfish and her friends.

When hungry gulper eels as well as undersea tremors threaten Inkling and Kwazii, Dashi uses the new, multi-purpose Octo Max Suit to rescue them.

Kwazii and Dashi become entangled in a strange deep-sea creature - a siphonophore.

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.

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.

When an underwater storm destroys a small reef, Tweak and her crew try to convert the Gup-F into an artificial equivalent.

When a sardine swallows the key to a treasure chest, a humpback whale helps Kwazii track it down.

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.

The Octonauts must stop a huge herd of sea pigs before they march blindly into the Mariana Trench - where there will be no access to food. But things get chaotic when Tunip goes missing!

As Tweak tests the Gup-X deep down in the Midnight Zone, a yeti crab cuts a vital electrical wire in the ship and cuts off all power, endangering itself and the Octonauts.

Christmas special of the animated deep sea adventure series. The Vegimals' plans for a Christmas feast aboard the Octopod are interrupted when the Octonauts are all entangled in a gigantic blob of sea snot!

Shellington and the Vegimals' mission to replant a mangrove forest is put in peril by a school of toothy barracudas.

While rescuing river creatures after a storm, the Octonauts find a strange egg and come under attack by stinging platypuses.

When Kwazii gets lost at sea aboard the tiny octo-ski, he meets a flotilla of even tinier sea skaters - the only insects who live on the ocean.

The Octonauts attempt to keep the peace amongst a trio of mudskippers whose home has been flooded.

The Octonauts' mission to explore Antarctica becomes a desperate rescue as a group of sea stars and urchins are threatened by a brinicle - a rare underwater icicle that can freeze creatures on the sea bed.

When Peso's patient, a remora fish, mysteriously disappears, the Octonauts enlist a unique undersea detective - a harbour seal.

A lion's mane jellyfish gets its long and stingy tentacles tangled in the bubble engine, unintentionally flooding the Octopod and causing havoc.

When Shellington and the crew try to gather some skittish crabs who have drifted away from home, they get help from some old friends.

A sea sponge that houses other sea creatures in its pores suffers from a mysterious illness and Peso must figure out the cause.

Shellington and the Octonauts try to track an unusual creature: a jellyfish that can transform from old to young repeatedly - and live forever!

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!

Peso goes with Barnacles to help his sister and her new polar cubs learn to navigate the harsh conditions of the frozen arctic.

The Octonauts meet some hammerheaded sharks, however, they can't sleep too well because Shellington and Professor Inkling have been arguing about who is smarter that they are no longer friends.

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

When a giant wave hurls Amazon River creatures up into the trees, the Octonauts must get them down safely, without disturbing poison dart frogs who live there.

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

When the Octopod breaks down, Tweak and the crew search for a missing part aboard an abandoned prototype of the ship, not realising something lives there.

As newborn baby sea turtles make their way to the ocean, the Octonauts must steer them clear a giant wave and hungry predators.

Captain Barnacles and his niece and nephew, Ursa and Orson, must rescue walrus pups who are stranded on a runaway ice floe, before it collides with a huge iceberg!

The Octonauts must get 2 mantis shrimp to stop fighting before their powerful claw strikes destroy the Octopod.

The Octonauts follow a strange song to a lonely humpback whale.

When a storm washes Peso onto a mysterious, rocky island, he meets a band of lobster-like insects thought to be extinct.

The Octonauts evacuate the creatures living around a reef before a large archway collapses, but one stubborn convict fish refuses to move from her burrow.

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

Tweak and the Octonauts go to The Everglades to visit her dad, Ranger Marsh and help him rescue some non-native creatures before a storm hits. The team's recently built GUP-K is also there to save the day.

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When a population of crawfish is stricken by illness, the Octonauts race to find a cure.

The Octonauts find a lost flamingo chick separated from his family and they have to return him there before hungry alligators do!

When a hungry tiger shark eats the camera that Tweak's turtle friend Sandy gets in the Octopod, she and the Octonauts must rescue her before it eats everything in its path.

When a huge sunfish enters the GUP-E, Peso and Kwazii must somehow get the large fish out of the Gup. Eventually they find out it's a Sunfish a fish with no fins.

While exploring a dark and spooky cave, The Octonauts find a strange fossil of a powerful prehistoric fish... but it may be more than just a fossil!

When surfing snails are swept out to sea, it's up to Dashi and the Octonauts to save them.

When Peso gets stranded on a beach with a mass of poisonous snakes after a terrible storm, he and the Octonauts must somehow get them back to the ocean.

Trying to return home from a mission along an African river, the Octonauts have trouble getting past a gang of large, mud-splatting, territorial hippos.

After Shellington crashes the GUP-D for the 3rd time, he and Kwazii team up with moray eels and grouper fish to help pick up the pieces and fix the vehicle before daylight occurs.

While diving down to the Midnight Zone, the Octonauts are attacked by bomber worms.

Dashi teams up with her little sister Koshi to help the Octonauts solve a mysterious disappearance in the Kelp Forest. This is the second episode in which is unknown who sounded the Octo-Alert.

Kwazii takes a vacation on Coconut Island where he gets hit by some coconuts. Then he and the Octonauts must help their old friends the Coconut Crabs discover who's stealing all their coconuts.

Kwazii adopts a baby alligator naming him Nipper, but when it escapes the Octopod, he and the Octonauts must rescue him.

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

The Octonauts embarked on an underwater adventure navigating a set of challenging caves to help a small octopus read return home to the Caribbean Sea.

In this musical special the Octonauts must find a way to hold back hungry swarms of Crown of Thorns starfish to save a new friend's fragile reef home.

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!

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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?

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