Ben 10: Ultimate Alien Episode 1.13 Deep

Ben, Gwen, and Kevin travel to the water planet Pisces (Ripjaws's home planet) after learning that Aggregor is on the planet. Aided by Magister Pyke, they travel to the planet's core, which contains a gravitational multiplier holding the water planet together. Aggregor steals the device, which is actually a disguised piece of the Map of Infinity, and escapes. To save the planet from floating into space, Ben transforms into Goop and uses his Antigravity Multiplier as a replacement. Goop is atomized into the water of the planet, allowing him to draw all the lost water back in. With Pisces back to normal and their ship repaired, Ben, Gwen, and Kevin return to Earth.