I SAW IT! It was big! It was all wiggly! And it ate everything!! IT WAS AN ALASKAN BULL WORM!!!!
~ SpongeBob talking about the Alaskan Bull Worm.

The Alaskan Bull Worm is an enormous, dangerous worm and an antagonist in the animated television series SpongeBob SquarePants, appearing in the episodes "Sandy, SpongeBob, and the Worm" and "My Leg!".

Its vocal sound effects were provided by Dee Bradley Baker, while its voice was provided by Rodger Bumpass.



According to SpongeBob, the beast came from Alaska where it wandered to Bikini Bottom and indiscriminately ate anything on sight, though so far it only devoured inanimate objects (with the exception of an unfortunate fish's rear end). SpongeBob is one of the few who witnessed it's rampage.

SpongeBob Squarepants

At the Krusty Krab where the people are discussing about 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 to even for her, even though she refuses numerous times (ironically, SpongeBob himself provided no solution in dealing the worm in a better way).

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 and abominable, it seems to have an ability to speak, as seen when he fell from that cliff and landed on Bikini Bottom (which was pushed to an area below the cliff), and then sarcastically moaned "Oooouch!"

The worm later made a cameo in "My Leg!", where SpongeBob is trying to help Fred hurt his leg to get him in the hospital to reunite with a nurse whom he is in love with. The worm appears when SpongeBob pours salt on Fred's leg and rings a bell to summon the worm hoping the worm would eat Fred's leg, but the worm just licks the salt off, much to their disgust.


The worm is a huge light pink beast with an appearance similar to other anthropomorphic worms in the franchise, except with an enormous size that dwarves the main cast. The exact size of the creature seemed to be inconsistent (unless it grew larger when chasing SpongeBob and Sandy): At first, it was huge enough that its mouth can be mistaken for a large cave, and the worm's tongue for the worm itself, but when it fell onto the newly moved Bikini Bottom, it has grown three to four times its previous size. Alaskan Bull Worms also possesses a pair of eyes with surprisingly good vision to perceive its surroundings on the surface, which it closes when it travels underground.


Alaskan Bull Worms are wild, ferocious, aggressive, man-eating, dangerous and carnivorous creatures, being always on the hunt for food, until it is full where it would rest and would soon be hungry again. Indiscriminate eaters, their diet includes, but is not limited to; fishes, lamp post, concrete walls, cars and various other inanimate objects.

However, Alaskan Bull Worms are extremely deadly and belligerent in their own right due to their intelligence and size, though not shown in the episode itself, it is implied that the worm entered Sandy's dome without causing it to be flooded before eating her tail and leave. They also seem to have a love of salt as shown in "My Leg!".

In Other Media

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, and in Creature from the Krusty Krab, where 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.

Powers and Abilities

When traveling underground, Alaskan Bull Worms switches from the sight to it's acute sense of hearing (and possibly seismic vibrations) for sensing prey on the surface.

The worm's saliva is implied to be an anesthetic substance as seen when it bites an unfortunate fish's rear end and Sandy's tail, neither of them felt any pain.


  • It is based on the mythological creature known as the Bloop.
  • The creature is an homage to the Graboid Larvaes from the Tremors series.


           SpongeBob Villains

Main Antagonists
Plankton | Karen Plankton | Mr. Krabs | Mrs. Puff

Recurring Antagonists
Flying Dutchman | Man Ray | Sinister Slug | Jumbo Shrimp | Atomic Flounder | Dirty Bubble | Bubble Bass | Plankton Family | DoodleBob

Movie Antagonists
Dennis | Victor | Cyclops | Boat Jacker | The Thug Tug Gang | Burger-Beard

One-Time Antagonists
Every Villain Is Lemons | Kevin C. Cucumber | Abrasive SpongeBob | Alaskan Bull Worm | Puffy Fluffy | Sergeant Sam Roderick | Tattletale Strangler | Lord Poltergeist | Carl | Big One | BlackJack SquarePants | Evil Alien Jellion Overlord | Sea Bear | Hash-Slinging Slasher | Con Man | Master Udon | Evil Syndicate | King Gorge | The Mawgu | Don Grouper | Gordon | Coupe | Triton | The Fisherman | Madame Hagfish | Dead-Eye Plankton | Art Appraiser | Miss Gretel Puss | Planktonamor | Dreaded Patrick | Karen 2.0 | Captain Scarfish | Dragon Jellyfish | The Jellions | SpongeBot SteelPants | Robot Plankton | Globulous Maximus | Flats the Flounder | ToyBob | Gale Doppler | Mini Doodles | Plankrab | Doctor Negative | Jelliens

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