The Great Barrier Reef, the world's largest structure of living organisms and 1,400 miles long, is home to the most diverse population of undersea life on the planet… and it's under attack!\n\nIn an epic story torn from the headlines, the Octonauts embark on their largest, most complex rescue mission ever: saving the Great Barrier Reef and all the creatures that live there from an invasion of coral-hungry crown-of-thorns starfish.\n\nThe Octonauts meet a tiny coral polyp looking to find a home on the very same reef where the Octonauts are deploying their new medical base, the Gup-W, and the Gup-P, a specialised first responder emergency vehicle.\n\nTo save the reef and their new polyp friend, the Octonauts must combine forces with a diverse crew of zapping, splatting and claw-snapping reef creatures to fend off the spiky, coral-munching starfish.
Source: CBeebies
Series 1 - The Crab And Urchin
Animated deep sea adventures with Captain Barnacles and his band of explorers. Barnacles and Kwazii investigate a disruption involving a crab on a nearby reef.
02-04-2025
CBeebies
Series 1 - The Undersea Storm
Animated deep sea adventures with Captain Barnacles and his band of explorers. Kwazii's Gup-B breaks down in a storm, but a chain of reef lobsters lends a hand.
01-04-2025
CBeebies
Series 1 - The Whale Shark
Animated deep sea adventures with Captain Barnacles and his band of explorers. Dashi is swallowed by a whale shark so the Octonauts venture inside to rescue her.
31-03-2025
CBeebies
Series 3 - Sea Skaters
Animated deep sea adventures with Captain Barnacles and his explorers. When Kwazii gets lost at sea aboard the tiny octo-ski, he meets a flotilla of sea skaters.
30-03-2025
CBeebies
Series 2 - Leafy Sea Dragons
Animated deep-sea adventures with Captain Barnacles and his explorers. Two young leafy sea dragons are accidentally brought onboard the Octopod.
30-03-2025
CBeebies
Series 3 - Duck-billed Platypus
Animated deep-sea adventures with Captain Barnacles and his explorers. While rescuing river creatures after a storm, the Octonauts find a strange egg.
29-03-2025
CBeebies
Series 2 - Lionfish
Animated deep sea adventures with Captain Barnacles and his explorers. The Octonauts get more than they bargained for with a pair of invasive lionfish.
29-03-2025
CBeebies
Series 5: 5. Feeding Frenzy
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 t ...
28-03-2025
CBeebies
Series 5: 4. Ghost Ship
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 quic ...
27-03-2025
CBeebies
Series 5: 3. Whales Of Mystery
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 Shellingto ...
26-03-2025
CBeebies
The Over, Under Adventure
Animated deep sea adventure series. The Octonauts' mission to explore Antarctica becomes a desperate rescue as a group of sea stars and urchins are threatened by a brinicle.
15-08-2024
CBeebies
Series 1 - The Hungry Pilot Fish
Animated deep-sea adventures with Captain Barnacles and his explorers. A lost pilot fish who eats ocean gunk cleans up the Octonauts' dirty gups.
09-11-2024
CBeebies
Series 3 - Humpback Whales
Animated deep-sea adventures with Captain Barnacles and his explorers. When a sardine swallows an important key, a humpback whale helps Kwazii track it down.
09-03-2025
CBeebies
Series 1 - The Midnight Zone
Animated deep-sea adventures with Captain Barnacles and his explorers. The Octonauts discover a strange rock that happens to be home to a new species of worm.
11-10-2024
CBeebies
Series 1 - The Giant Whirlpool
Animated deep-sea adventures with Captain Barnacles and his explorers. Tweak's pal, a leatherback sea turtle, is caught in a fast-moving ocean current.
19-10-2024
CBeebies