The Atomic Flounder seems to be the only villain that aged unlike Man Ray, the Dirty Bubble, The Moth, the Sinister Slug, the Jumbo Shrimp and Kelp Thing. He is a very light colored flounder. He wears a green sweater over a yellow shirt and red tie, brown plaid pants, a tiny hat and carries an umbrella as cane, but in The Bad Guy Club for Villains he was lavender and his eyes are like aliens and he has a tail and he has no sweater, no umbrella, no plaid pants, no tie, no hat and no shirt, just a thing used for box fights.
- The Atomic Flounder's atomic ray was possibly taken from Godzilla.
- He may be related to Flats and/or Brian Flounder.
- Get off me! (After SpongeBob says that he could "Snap...Just like that!")
- If I weren't retired I'd ROAR!