He is an old, live-action character who wears a white sailor hat. He appears to have gray hair and he has a blue jacket. Underneath his jacket is a blue shirt with white dots.
He briefly appears in the episode "Mermaid Man and Barnacle Boy" when SpongeBob SquarePants is talking about how old people are the greatest. After he tells about how they are full of wisdom and experience, the Old Sailor is briefly seen giving a thumbs up. He uses his right arm while doing this.