Incidental 84, also known as Old Fish C is an elderly fish who makes several appearances throughout the series, starting with the episode "Mermaid Man and Barnacle Boy."
Incidental 84 is a light gray, elderly fish who wears a light blue dress with olive-green spots. She uses a wheelchair and has light gray hair.
- In her model image, her left arm is missing. This is actually an error from the episode that the frame for her model image was taken from.