Series 2: 2. Adelie Penguins
The Great Arctic Adventure
Series 2: 1. The Colossal Squid
Series 3: 20. Loggerhead Sea Turtle
Series 3: 19. Hammerhead Sharks
Series 3 - Urchin Invasion
Animated deep sea adventures. The Octonauts head to the kelp forest to visit Shellington's sister, Pearl, and her newborn son Periwinkle.
Series 3 - Immortal Jellyfish
Animated deep sea adventures. Shellington and the Octonauts try to track an unusual creature: a jellyfish that can live forever!
Series 3 - Sea Sponge
Animated deep-sea adventures. A sea sponge that houses other sea creatures in its pores suffers from a mysterious illness and Peso must figure out the cause.
Series 3 - Red Rock Crabs
Animated deep sea adventures. When Shellington and the crew try to gather some skittish crabs who have drifted away from home, they get help from some old friends.
Series 3 - Lion's Mane Jellyfish
Animated deep sea adventures. A lion's mane jellyfish gets its long and stingy tentacles tangled in the bubble engine, unintentionally flooding the Octopod.
Series 4: 1. Octonauts And The Poison Dart Frogs
Series 3 - Siphonophore
Animated deep sea adventures with Captain Barnacles and his explorers. Kwazii and Dashi become entangled in a strange deep-sea creature - a siphonophore.
Series 4: 18. Octonauts And The Hippos
Series 1 - The Parrotfish
Captain Barnacles and his intrepid band of explorers sing about underwater creatures. The Octonauts share a few fun facts about the parrotfish.
Series 2 - Swashbuckling Swordfish
Animated deep sea adventures with Captain Barnacles and his explorers. In search of a mythical sword, Kwazii explores a pirate shipwreck.
Series 4: 15. Octonauts And The Coelacanth
A Very Vegimals Christmas
Series 3 - Pelicans
Animated deep sea adventures with Captain Barnacles and his explorers. A floating garbage patch endangers a flock of pelicans and other sea creatures.
Series 1 - The Seahorse Tale
Animated deep sea adventures with Captain Barnacles and his explorers. After a storm, the Octonauts have to reunite a seahorse with its missing mate.