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Atomic Flounder

on ESB
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Atomic Flounder

Atomic Flounder2



Occupation(s): Retired Super villain
Physical appearance
Gender: Male
Eye color: Black
Classification: Fish
Enemies: Mermaid Man
Barnacle Boy
Series information
First appearance: "Mermaid Man and Barnacle Boy II"
Latest appearance: "The Bad Guy Club for Villains"
SpongeBob Moves In! (as a cardboard cut out)
Portrayer: Carlos Alazraqui (in "Mermaid Man and Barnacle Boy II")
Dee Bradley Baker (in "The Bad Guy Club for Villains")
List of characters

The Atomic Flounder is a retired villain  Mermaid Man and Barnacle Boy, who can blast people with his atomic breath.


In "Mermaid Man and Barnacle Boy II", he is gray, has a green shirt with checkered pants and a black hat on his head. His super villain form wears a hazmat suit.

In "The Bad Guy Club for Villains", he has a shark fin, two fish legs, human hands, one eye, an eye stalk on the left side of his head, and has a shark tail.


I can turn into a skyscraper!
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  • The Atomic Flounder's atomic ray, which was seen in "Mermaid Man and Barnacle Boy II," is possibly a reference to Godzilla.
  • He was actually a fish in a lab experiment, but it went haywire and he became the villain he is now.
  • The Atomic Flounder is the only retired villain and the only one who has aged besides Viro Regnato.
Mermaid Man and Barnacle Boy (VE)

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