Carl was manager of the Krabby O Mondays. Squidward disliked him because he thinks that Carl is nasty and threatens a lot. SpongeBob did not exactly like him either after finding out the secret. Carl was very nice but in a bossy, selfish, control freak way. It is unknown what happened to him after Krabby O Mondays was shut down and turned back to the Krusty Krab. Carl was hired by Howard Blandy, the man who bought the Krusty Krab. His only appearance so far is in the episode: Selling Out, Carl was happy but also mean and selfish to replace Krabby Patties with gray sludge.
Carl is a fish with a lavender suit and glasses, his eyes are widely spaced. He wears a purple necktie with one stripe roughly in the middle. Carl has a small name tag displaying "Carl" on the left side of his shirt. He is smiling almost all time in that episode.
- Carl is actually named after his voice actor, C.H. Greenblatt, who is also a writer and storyboard artist in seasons 1–4 and creator of the show Chowder that aired on Cartoon Network.