Jason makes his only appearance in the episode "Rule of Dumb."
Jason is a fish with a green ugly sweater and orange hair that is gelled up. He also has grayish skin. Jason is only seen in an unnamed TV show that SpongeBob was watching.
SpongeBob watches a TV show where a lady confronts Jason and states that there is someone he should know of. The lady then shows Jason his grandpa in which Jason acts surprised.Patrick then comes into SpongeBob's house and smashes his head through SpongeBob's TV causing it to break and thus not allowing SpongeBob to continue to watch his show.