Rock monster
This rock is alive
General information
Residence: Animal Shelter, Pacific Ocean
Physical appearance
Color: Purple, teal, and tangerine
Classification: Living rock
Enemies: Sheldon J. Plankton
Series information
Appearance: "Plankton's Pet"
List of characters

The rock monster is a creature only seen in "Plankton's Pet."


It is a rock that has teal algae with tiny tangerine coral like plants on its head. It has a large long pink tongue and slightly yellow teeth in its big, gaping mouth.


When SpongeBob takes Plankton to the animal shelter to find a new pet, Plankton mistakes this monster for a plant, until it grabs him with its tongue. Then Spot comes and bites the monster's tongue and saves Plankton.

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