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.
Source: CBeebies
Series 2 - Saltwater Crocodile
Animated deep sea adventures with Captain Barnacles and his explorers. The Octonauts must figure out how to get a gigantic saltwater crocodile back home.
04-07-2025
CBeebies
Series 2 - Manatees
Animated deep sea adventures with Captain Barnacles and his explorers. Running out of air, Barnacles struggles to free his paw from the mouth of a giant clam.
03-07-2025
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.
02-07-2025
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.
01-07-2025
CBeebies
Series 2 - Mimic Octopus
Animated deep sea adventures with Captain Barnacles and his explorers. The Octonauts recruit a shape-shifting mimic octopus to help them on a mission.
30-06-2025
CBeebies
Series 1 - The Snot Sea Cucumber
Animated deep-sea adventures with Captain Barnacles and his explorers. A slimy, slippery snot sea cucumber gets loose onboard the Octopod.
25-04-2025
CBeebies
Series 1 - The Orcas
Animated deep sea adventures with Captain Barnacles and his band of explorers. An orca whale is stranded on a beach. The Octonauts come to the rescue.
08-04-2025
CBeebies
Creature Reports - The Snot Sea Cucumber
The Octonauts sing about underwater creatures. The Octonauts share a few fun facts about the snot sea cucumber.
02-07-2014
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
Creature Reports - The Orcas
Captain Barnacles and his band of explorers sing about underwater creatures. The Octonauts share a few fun facts about orcas.
03-07-2014
CBeebies
Series 3 - Harbour Seal
Animated deep-sea adventures with Captain Barnacles and his explorers. When Peso's patient mysteriously disappears, the Octonauts enlist a unique undersea detective.
31-05-2025
CBeebies