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Kwazii enters a shipwreck to get a medallion, which doubles as a map, to an underwater hidden city. This leads the Octonauts up the Amazon River. Once there, they see a flock of parrots, a group of freshwater stingrays, some black caimans, and a bunch of Amazonian manatees. But when a falling tree traps the Gup-A, and a tidal bore comes up the river, the Octonauts are scattered. Captain Barnacles looks for the others with the aid of an Amazon river dolphin named Berta with echolocation abilities. The Octonauts help Peso with an electric eel tangled on a tree root, and Dashi with a stranded arapaima and get chased by piranhas, when they find Shellington and Tunip. Tweak and a wood-eating panique catfish free the trapped Gup-A. Meanwhile, Kwazii has been saved by Calico Jack, his grandfather who turns out to be alive! But lost his ship after an attack by fire ants and a giant anaconda. His incomplete map had led him in circles, but Kwazii's piece completes it so they can finish the quest. After being blocked by hostile capybaras they are reunited with the others in time to fight off a swarm of anacondas. Finally, the "hidden city" turns out to be a colony of golden freshwater sponges at the bottom of a pool with all sorts of new species of fish.

In the end, Kwazii learns it’s not the treasure that matters, it’s the adventure that counts. And even though he finally found Calico Jack after all this time, he turned down the offer of joining his grandfather as he is still an Octonaut and already has a crew and ship to set sail with.

Creatures[]

  • Arapaima
  • Piranha
  • Black Caiman
  • Anaconda
  • Capybara
  • Electric eel
  • Panaque/Wood-Eating Catfish
  • Amazon River Dolphin
  • Parrots

Trivia[]

  • In real life, Captain Barnacles and Peso would quickly overheat in a tropical environment due to them being adapted for colder climates.
  • Arapaimas eat piranhas.
  • The whole crew meets Calico Jack for the very first time.
  • Black Caiman have more alligator like snouts and their bottom teeth don't show when their mouths are closed.
  • There were two cameos. The golden jar from the episode "The Monster Map" appears in the corner of Calico Jack's hide out. Along with the shell from the episode "The Hermit Crab."
  • There are two morals learned in this episode: Adventure is the true treasure and friends are more important than fame.
  • There was a easter egg of a golden jar when Kwazii woke up with Calico jack.
  • This episode reveals the Vegimals' ability to survive in freshwater.

Gallery[]

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