Join Captain Barnacles and crew on their animated underwater adventures.
When Captain Barnacles 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.
Kwazii is spooked when he spots what looks like a giant underwater spider. However, it turns out to be a very old giant spider crab who needs the Octonauts' help.
The Octonauts, for more deep sea adventures. 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.
Returning home from a mission along an African river, the Octonauts encounter a gang of large, territorial hippos.
After Shellington crashes the Gup-D, he and Kwazii team up with a moray eel and grouper fish to pick up the pieces.
While diving down to the Midnight Zone, the Octonauts are attacked by bomber worms and are enlisted to rescue an injured member of their troop.
Dashi teams up with her little sister Koshi to solve a mysterious disappearance in a kelp forest.
Kwazii and the Octonauts help their friends the coconut crabs discover who is stealing their coconuts.
Kwazii adopts a baby alligator, but when it escapes from the Octopod he must rescue the tiny creature from ocean currents and hungry predators.
The Octonauts struggle to save a pod of spinner dolphins who seem to be swimming in their sleep.
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?
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!
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!
Complete episode guide for Octonauts with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
This episode guide is organized by seasons, making it easy to track your viewing progress or find specific episodes. Use the episode information to plan your binge-watching sessions or catch up on missed episodes.