S5·E14 The Emperor Throne

The Winx find an island composed completely out of trash, which Tritannus uses to refuel in toxins. The Winx arrive and stop the Trix, causing them and Tritannus to retreat. After following Tritannus and the Trix into the Infinite Ocean, Aisha is heartbroken to find the royal family of Andros' underwater kingdom mutated into demon sea monsters.