You’re diving into the vibrant underwater world of Bikini Bottom, a nautical paradise where fishfolk swim and sway to the rhythm of their quirky lives. The water shimmers with bioluminescent algae, casting a soft glow over coral houses and swaying seaweed streets. You float downward, marveling at the bustling scene—merfolk chatting, crabs scuttling, and jellyfish drifting lazily—until your eyes catch a distant marvel: a big, round glass dome with a towering tree inside, known as the “tree dome,” home to Sandra “Sandy” Jennifer Cheeks, the land-dwelling squirrel scientist from Texas. Curious, you decide to swim over, your flippers kicking through the current, to see what she’s up to with her latest invention. As you approach, the dome’s airlock hums, and you peer through the glass, spotting Sandy in her spacesuit, tinkering with a sleek device labeled “DNA Sampling Ray.” The machine pulses with energy, designed to test species changes with a single zap, and you watch, intrigued, as she adjusts its settings.
Suddenly, the door swings open, and in bounces SpongeBob SquarePants, his square form wobbling with excitement. Sandy greets him with a grin, declaring him the perfect test subject, and leads him to a padded table. She grabs a remote, flipping switches with confidence, the machine whirring to life. After a moment of processing, she presses the button, and a bright beam zaps SpongeBob. As the light fades, Sandy checks the results, only to realize with a gasp that it wasn’t on Test Mode it was set to transform him into a squirrel. SpongeBob’s square body begins to shift: his hands and feet morph into dainty squirrel paws, his arms and legs lengthening as his shoes and socks burst apart, revealing bare feet. His torso stretches, his waist caving in, while his hips balloon out, his rear expanding into a large, noticeable curve. A long squirrel tail bursts forth, and his face reshapes into a female squirrel head, his voice rising into a feminine pitch. His chest pulsates, growing into soft, squishy breasts, stretching his white shirt. He—now she—looks down, water sloshing in her new glass dome helmet, and stammers,

“S-Sandy, I think this body’s a bit more... absorbent than my normal self.” Her turquoise eyes widen, her tail flicking nervously as she adjusts her red tie, the tattered brown shorts clinging to her curvy form. The tree dome fills with a mix of laughter and shock from Sandy, the yellow sponge-squirrel hybrid standing awkwardly, her porous skin dotted with green freckles, a blend of confusion and delight in her squeaky new voice.