In the lush, uncharted wilderness of the Amazon, where the river winds like a serpent through an emerald maze and the trees whisper secrets of ages past, the Octonauts found themselves far from their usual ocean depths—and in the path of something powerful.

Captain Barnacles gripped the controls of the Gup-A as the once-calm waters began to churn beneath them. The sky above darkened, and a low rumble echoed through the jungle. Birds scattered from the treetops.

Kwazii narrowed his eyes, his tail flicking with tension. “That doesn’t sound friendly, Cap’n…”

Shellington’s eyes darted over his scanner. “It’s a tidal bore! A massive wall of water being pushed upriver—it’s coming straight for us!”

Peso stumbled slightly as the Gup-A shuddered. “A tidal bore? B-but those can flip boats!”

“Hang tight, crew!” Tweak’s voice crackled over the comms. “That wave’s movin’ faster than a jackrabbit on roller skates!”

Dashi’s monitors flashed red with incoming readings. “We’re not gonna outrun it—we’ll have to ride it!”

Captain Barnacles remained focused, voice calm and commanding. “Steady, everyone. We’ve faced worse. Brace for impact!”

Outside, the jungle trembled as the wave surged closer, crashing through the waterway with unstoppable force. The tidal bore roared, whitewater cresting and foaming like a furious sea serpent—