OctonautsSeason 32013 · 20 episodesEpisodes1The SiphonophoreKwazii and Dashi become entangled in a strange deep-sea creature - a siphonophore.2The Water BearsThe gang ventures into a red-hot lava tube to rescue a tiny water bear that does not seem to mind the heat at all.3The Cone SnailPeso 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.4The Artificial ReefWhen an underwater storm destroys a small reef, Tweak and her crew try to convert the Gup-F into an artificial equivalent.5The Humpback WhalesWhen a sardine swallows the key to a treasure chest, a humpback whale helps Kwazii track it down.6The PelicansWhen a floating garbage patch endangers a flock of pelicans and other sea creatures, the Octonauts and the birds work together to clean it up.7The Sea PigsThe 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!8The Yeti CrabAs 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.9The BarracudasShellington and the Vegimals' mission to replant a mangrove forest is put in peril by a school of toothy barracudas.10The Duck-Billed PlatypusWhile rescuing river creatures after a storm, the Octonauts find a strange egg and come under attack by stinging platypuses.11The Sea SkatersWhen 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.12The MudskippersThe Octonauts attempt to keep the peace amongst a trio of mudskippers whose home has been flooded.13The Harbour SealWhen Peso's patient, a remora fish, mysteriously disappears, the Octonauts enlist a unique undersea detective - a harbour seal.14The Lion's Mane JellyfishA lion's mane jellyfish gets its long and stingy tentacles tangled in the bubble engine, unintentionally flooding the Octopod and causing havoc.15The Red Rock CrabsWhen Shellington and the crew try to gather some skittish crabs who have drifted away from home, they get help from some old friends.16The Sea SpongeA sea sponge that houses other sea creatures in its pores suffers from a mysterious illness and Peso must figure out the cause.17The Immortal JellyfishShellington and the Octonauts try to track an unusual creature: a jellyfish that can transform from old to young repeatedly - and live forever!18The Urchin InvasionThe 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!19The Hammerhead SharksThe 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.20The Loggerhead Sea TurtleAfter an undersea tremor separates the Gup-X and its crew, Barnacles seeks guidance from a mysterious sea turtle.Season 1Season 2Season 4Season 5Season 6Season 7Season 8Season 9Season 10Season 11
