Julie Fish is the younger, teenaged sister of Nancy Suzy Fish, who she looks identical to. She appears first in "The Chaperone", where she went to the Prom, at Pearl's School, where a man was 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. She lives with Nancy Suzy Fish and Isabelle.