| Unofficial Name
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|Interests:||Messing with SpongeBob and Patrick|
|Gender:||Portrayed as male|
|First appearance:||"To Save a Squirrel"|
|Latest appearance:||"To Save a Squirrel"|
|List of characters|
The Cave Fish is an alter ego of Sandy Cheeks who only appeared in "To Save a Squirrel." He met SpongeBob and Patrick when they arrived in the cave to play Hide and Seek. SpongeBob said, "I like it in here. It's roomy." Then the Cave Fish laughed. SpongeBob and Patrick thought the laugh came from some mice, but they were wrong. The Cave Fish jumped out and told them he had been there for forty years. He also said they would all be in the cave forever. The Cave Fish turned SpongeBob and Patrick against each other by telling them the only way to survive was to eat what you could. He said, "Eat or be eaten."
At the end of the episode, Sandy revealed herself as the Cave Fish. She gave SpongeBob and Patrick medals to show that they were survivalists. However, the duo, still in a state of hunger, almost ate her.