Incidental 27 (named JimmyGus) is a background character who makes many cameo appearances in episodes, starting with "Ripped Pants."
He is olive green and so are his fins and lips but his fins and lips are slightly brighter. Jimmy has a golden-yellow dorsal fin and wears a light purple shirt and a blue pair of pants. Jimmy wears a black top hat with a magenta-red strip. He appears without his top hat in some episodes. He has dark green lips and yellow eyes.