Mr. Smith is a faded blue child fish who has blue fins and wears a light yellow shirt and a red cap.
Mr. Smith is shown when SpongeBob just got his longpants and has entered the Krusty Krab and everyone was looking at SpongeBob because of his longpants. He pointed at him and asks his mother, Martha, "Is that my daddy?" and Martha says the line, "I wish." and stares at SpongeBob more.