NancySuzy Fish is gray white-haired fish who is the most commonly used female character model. She is usually dark blue in color and wears a yellow dress, her hair is white in a bob style and she wears a yellow headband, although her color and appearance vary in certain episodes, for example, "The Sponge Who Could Fly" where she wore a magenta colored shirt. In the first season, she had pink lips, even in some of the early Season 2 episodes, but by Bossy Boots, the lips have been recolored.
She is often seen eating at the Krusty Krab, and in several episodes, she is seen attending Mrs. Puff's Boating School. She is often seen with Fred, particularly in earlier episodes, while in "No Weenies Allowed," she is seen picnicking at Goo Lagoon with Tom and who is apparently their child, Isabelle. She is among Pearl's friends, suggesting she is a teenager, although in other episodes she is clearly portrayed as an adult.
She has often been voiced by Sirena Irwin in almost every episode she was in.