Mr. Puff was Mrs. Puff's husband. Unfortunately, he was killed by humans, and turned into a light cover. The only picture of him was in the episode Krusty Love, where he is shown getting turned on by a human hand pulling a switch. SpongeBob says Mrs. Puff doesn't like to talk about what happened to him.
Trivia
- Mr. Puff was probably killed and taken to Shell City, being sold.