|Aliases:||Moist Cave (a mistake by Sandy)|
|List of characters|
The Sea Monster is a monster who appears in the episode "Prehibernation Week."
It is a big, elephant looking dark green monster with a long trunk and three eyes.
When Sandy ordered the other people in town to go look for SpongeBob she told the other people to check inside a moist cave she found. But the moist cave was revealed to be the elephant-like trunk of a hideous monster.
- Due to having a trunk like an elephant, the Sea Monster could be an elephantfish, or possibly a spoof of it.