Julie Fish is the younger, teenaged sister of Nancy Suzy Fish, who she looks identical to. She makes a few appearances throughout the series.
She is a light-gray colored fish with light yellow eyes and black pupils. She has white hair and red lips. She wears a mustard yellow dress, light-red clam-shaped earrings, and a yellow headband.
She appears first in "The Chaperone," where she goes to the prom, at Pearl's school, where a man is painting a picture of her. She also appears in "Hooky" at one of Pearl's parties, and laughing at SpongeBob after getting attached to the hook. She also appears in "Whale of a Birthday" at Pearl's sixteenth birthday party. Pearl also mentions that Julie says Angela does like Brad, which she hears from Marcie.