Judge Stickleback is a middle-aged judge who appears in the episode "Krabs vs. Plankton."
Judge Stickleback is a light turquoise stickleback fish with light pink lips. She has light grayish-violet hair, small bead-shaped eyes, and a few wrinkles on her face. She wears glasses and a black robe. Her body is not shown.
She is a fair judge who rarely gets emotional. She shows some compassion for Plankton when he tells a false story about his Gram-Gram, which is a trick to get the jury on his side. She sits at a wooden judge desk and asks Plankton and Mr. Krabs questions about the case of Plankton falling because there wasn't a wet floor sign. When Mr. Krabs is declared "not guilty," she closes the case.
- It is possible that Judge Stickleback may be a spoof of both Judy Sheindlin, star of the longest-running court series Judge Judy, because of her looking middle age, and Marilyn Milian, who has been the judge on The People's Court since 2001, and is the first Latina judge to preside over a court show.