He is a light purple fish that wears pants with two yellow buttons and wears a green newsie hat. In his first two appearances, "Hall Monitor" and "Mermaid Man and Barnacle Boy II," his pants are blue with two yellow buttons. In his third appearance, "Little Yellow Book," his pants are light brown.
The Newspaper Boy is a newsboy in two of his appearances. In "Hall Monitor" and "Little Yellow Book," he appears trying to sell newspapers.
He has also been a mailfish. He was a mailfish in "Mermaid Man and Barnacle Boy II."
In end credits of "Hall Monitor," Newspaper Boy is mistakenly credited as "Newsie." However, in the end credits of "Little Yellow Book," he is correctly credited as "Paperboy."