This is the page about the brown fish. For other uses, see Billy (disambiguation).
Billy  is a light brown fish who first appears in the episode "Prehibernation Week."
Billy appears to be light brown in color, with a light yellow dorsal fin. He has black eyes and is usually seen wearing a red T-shirt and a white and blue propeller cap.
Role in series
Billy is in a super market when he walks up to Sandy and then Mable-Monica says, "Billy, don't talk to a squirrel. You'll catch its stupid."
- In some episodes, he can be seen in winter clothes.
- His production label is "kid w/ beanie.