He is a tall, lavender fish who wears an olive green suit with a green tie and a hat.
Role in episode
He is very cruel to SpongeBob and Patrick, even though they are not supposed to be at the prison making him the main antagonist. He acts like a military sergeant/prison guard and is tough. He is very harsh to the criminals and hates almost everything except the play that SpongeBob arranges.
When the scoutmaster of SpongeBob‘ s troop arrives, the Warden is disgusted to hear all of the activities that the camp has to go through. When he remarks that not even a vilest of people deserve that, the Warden just an idea to punish the inmates for trying to escape by making them go through the camps activities.
R. Lee Ermey, the portrayer of the warden did in fact used to be in the military, just like his character in the episode.
The warden's demeanor appears to be based on that of Gunnery Sergeant Hartman from the 1987 Stanley Kubrick film Full Metal Jacket, whom R. Lee Ermey (the voice of the warden) also portrayed.
The warden is similar to the warden in the novel and its movie adaptation, Holes.