42 Whelk Attack

Giant sea whelks invade Bikini Bottom and terrorize the residents. They eat everything in their wake, which alarms SpongeBob and Patrick. They head to the Krusty Krab, where Mr. Krabs welcomes the whelks, but SpongeBob, Patrick, and Squidward spot the mother whelk, who eats all of Bikini Bottom, including Squidward and Mr. Krabs. SpongeBob and Patrick go to Sandy at her Treedome to get away from the whelks, but the mother eats all three of them. SpongeBob and Patrick wake up in the mother's stomach and manage to swim to the eaten Krusty Krab. There, Sandy discovers that the whelks have sniffles, so SpongeBob soaks them, curing the whelks.