After escaping from the Sirens, Scrooge McDuck, his nephews, and King Homer reach a whirlpool next to a cliff where Yuckalinda sleeps inside a cave. King Homer warns that they all must stay quiet and not wake her up. However, after Huey ate one of King Blowhard's umma-gumma fruit, he sneezed really loud, awakening Yuckalinda. She pokes her head out of her cave, immediately demanding to know who awakened her. Then, upon seeing the heroes, she delightfully sees them as lunch and drops down to eat them. Huey threw an umma-gumma fruit into her mouth, and she finds it rather delicious, which gives Dewey an idea. By wrapping a bunch of umma-gumma fruit with rope and throwing it at Yuckalinda, she both ate the fruit and pulled their yacht out of the whirlpool's currents and into safety.
Yuckalinda appears again later near the end of the episode, at night when the Time Twister carrying Scrooge and his nephews whirls by her cave. She comes out to see what the noise was while still being sleepy.