Harold "Bill" "Scott"Reginald is a light blue background fish who first appears in the episode "Ripped Pants." Like other character models, his appearance is not perfectly consistent, and in some episodes, he is completely naked. This means that the two names the basic design was referred to could indeed be separate people.
He is a light blue fish with a dark blue dorsal fin. On the sides of his head, there are light red-purple spots. He has light salmon lips and black eyes. He wears a white t-shirt and a red speedo.
He appears to be ill-tempered and cynical in most of his appearances. His name is revealed in the episode "Roller Cowards." In "Porous Pockets," Bert calls him "Bill." However, his name is confirmed in "Gary in Love" as "Harold." He has been voiced by both Doug Lawrence and Dee Bradley Baker. Lawrence's portrayal gives him a more common American accent, while Baker's gives him an English one.
"Hey, funny guy! I got a joke for you! What smells rotten and puts people to sleep?"
He could be a shark because of his fin and his occasional sharp teeth.
In "Roller Cowards," he was called Harold while in "Porous Pockets," he was named Bill. This may be because his name was changed to Harold for the "Fiery Fist O' Pain" Commercial. Though in "Gary in Love," he talks to himself, calling himself Harold. It can be presumed that his real name is Harold.