If you were looking for the article about the Sea Monster from Goo Lagoon, then see Sea Monster (Goo Lagoon).
If you were looking for the article about the Sea Monster from Prehibernation Week, then see Sea Monster (Prehibernation Week).
If you were looking for the article about the Sea Monster from Mutiny on the Krusty, then see Sea Monster (Mutiny on the Krusty).
N. Unofficial name

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Sea Monster
20,000 Patties Under the Sea 080
Physical appearance
Gender: Male
Color: Lime green, light green, and light purple
Eye color: Light yellow with red pupil
Friends: Patrick Star
SpongeBob SquarePants
Series information
First appearance: "20,000 Patties Under the Sea"
Latest appearance: "The Legend of SpongeBob"
Portrayer: Gene Simmons
List of characters

The Sea Monster is a character who only appears in the episode "20,000 Patties Under the Sea." 


He has the appearance of a giant, mutant, one-eyed monster, with a long enormous tail. He is lime green in color with a light green stomach and light purple lips. 


When SpongeBob and Patrick fall into the abyss, The Sea Monster is in the bottom. The Sea Monster has been asleep for 79 years. He bought a lot of Krabby Patties and Chum Patties. He has a cruel attitude, seemingly evil, and strong.

In "The Legend of SpongeBob" mini, SpongeBob throws the spatula in his eye, then he cries.


  • This sea monster is the only monster character so far who actually likes Plankton's Chum.


  • It is unknown how the sea monster knows that he has slept for 79 years.

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