Mr. Smith is a faded-blue child fish who has dark blue fins and wears a light yellow shirt and a red cap.
Role in episode
Mr. Smith is shown when SpongeBob just got his long pants and has entered the Krusty Krab. Everyone looks at SpongeBob because of his long pants and Mr. Smith points at him and asks his mother if SpongeBob is his father. Martha says replies, "I wish" and stares at SpongeBob more.