The Alaskan Bull Worm is a giantic worm that appeared in the SpongeBob SquarePants episode, Sandy, SpongeBob, and the Worm. The worm is so enormous that it is able to easily destroy property within seconds by eating it, and can crush an entire city with its weight. In addition, it is so big that its mouth can be mistaken for a large cave, and the worm's tongue for the worm itself.

At the Krusty Krab, where the people are discussing the worm's rampages, SpongeBob gives a description of the worm, saying it is "big, scary, and pink". Sandy offers to fight the worm, and SpongeBob desperately tries to stop and tell her it is far too big even for her, even through she refuses numerous times. SpongeBob and Sandy are later chased by the worm in the episode, until they lost the worm when it accidentally fell off a cliff and crushed Bikini Bottom. Although it was monstrous, it seems to have an ability to talk, as shown when he fell from that cliff and landed on Bikini Bottom (which was pushed to an area below the cliff), and then said "Oooouch!"

The Alaskan Bull Worm has appeared in at least two video games: in the Gameboy Advance version of SpongeBob SquarePants: Revenge of the Flying Dutchman, where the worm is a boss that attacks while SpongeBob and Sandy were learning karate in the worm's cave. In Creature from the Krusty Krab, the worm swallows Spongebob at the beginning of the level "Alaskan Belly Trouble". The rest of the level involves Spongebob trying to escape the worm.