The janitor is a character who first appears in the episode "Big Pink Loser."
He is an olive green fish with dark purple lips and light purple dorsal fins. He wears faded-blue overalls, an orange shirt, and a small orange hat. He appears to have two jobs, as a delivery fish in "Big Pink Loser" and a garbage fish in "Sailor Mouth" and "Artist Unknown." He appears in multiple other episodes doing other jobs.