Octonauts

Corrosion on the Octopod sends the crew to deep hydrothermal vents, where they help iron-shelled scaly-foot snails relocate and repair the damage. Then a mud volcano eruption in the Mariana Trench traps Shellington and Dashi; Captain Barnacles rescues them, and the team studies heat-resistant Pompeii worms to find new habitats.

The Octonauts explore the glowing Milky Sea and guide migrating sardines away from predators to secure their route. Then Octo-Bots go missing in a boiling sulphur lake; Kwazii dives in to rescue them just before the surface hardens, protecting the lake's unique extreme-environment creatures.

The Octonauts meet Nana, a bluefin tuna separated from her school, and escort her past nets and predators to reunite with her group. Then, chasing a rumored sea monster, Kwazii finds flying squid gliding above the waves; the crew helps them evade dolphins and reach their spawning grounds.

A blue whale trapped in a narrow bay faces stranding until the Octonauts use sonar and high tide to guide it back to open ocean. Then Kwazii meets nautiluses, ancient living fossils that control buoyancy with gas chambers; the crew guides a lost one home and studies its long evolutionary history.

A storm separates sea lion pups from their colony; Peso and Captain Barnacles rescue an injured pup and reunite the herd in a safer breeding area. Then strange whale songs lead the Octonauts to rare beaked whales, which they quietly observe and record without disturbing the animals.

Kwazii's peg leg is gnawed by wood-eating catfish, sending the crew to Amazon waterways to clear sunken wreckage and protect the river habitat. Then a drifting ghost ship's spooky noises turn out to be hull barnacles; the Octonauts tow the ship to warm seas to save the colony.

Lost in the freezing Antarctic deep sea, Shellington and Dashi are guided home by giant sea spiders familiar with the terrain. Then zombie worms erode the Octopod's base by feeding on whale bones with acid; the crew relocates them to a natural whale skeleton to remove the threat.

A deep-sea expedition reveals glowing marine life until a submarine landslide strikes; the crew escapes using teamwork and collects valuable survey data. Then excess algae harms a coral reef as seven filtering sea squirts scatter; the Octonauts reunite them to purify the water and restore balance.

Damaged river channels block salmon migration, so the Octonauts help beavers rebuild dams and open a path upstream. Then two axolotls in drying Mexican wetlands face heron threats; Captain Barnacles and Kwazii escort them to new waters and learn about their limb regeneration.

Vegimals accidentally bring bullfrogs aboard the Octopod, and the team works together to catch them and return them safely to native waters. Then a shark feeding frenzy traps Shellington and Dashi between rocks on a coral reef; Captain Barnacles creates a distraction to pull them free.

Reef fish carrying tongue-eating lice prompt Peso to check on their health as the Octonauts guide the school to cleaner waters. Then an endangered hawksbill turtle falls ill from marine plastic; Peso treats it while the crew cleans the reef, then releases the turtle to safe waters.

A grey whale calf loses its mother during migration; the Octonauts care for it, trace the migration route, and reunite mother and calf. Then Kwazii chases legendary pirate treasure and the crew meets endangered sawfish on the river, clearing barriers to reopen their migration route.

False cleaner fish mimic cleaners and bite reef fish, causing panic; Shellington studies their behavior as the team builds safe cleaning stations. Then a storm destroys the shared burrow of a goby and blind shrimp; the Octonauts reunite the pair and help rebuild their home.

The Octonauts help Min conduct field research. A giant salamander blocks the path to protect its overheated eggs. The crew moves the eggs to cooler streams to protect this rare amphibian species.