Ben 10: Ultimate Alien: Season 1, Episode 13

1 - 13: Deep

Ben, Gwen, and Kevin travel to the center of a water planet, namely Pisces, Ripjaws' home planet in an attempt to find Aggregor. They end up getting help from Magister Pyke, one of Ripjaws' species. The planet has a 2% solid core, which holds an instrument that holds the planet's water together in a gravitational pull. Aggregor takes the instrument and reveals it to be a piece of The Map of Infinity. As the planet is pulling apart, Aggregor escapes. Ben transforms into Goop and uses Goop's anti-gravitational UFO in an attempt to fix the centripetal force holding the planet together. Goop vanishes, and Kevin says he was atomized and spread throughout the ocean. The water then turns green, and Goop pulls the planet back together.