Harold is a Cyan dogfish with a dark blue dorsal fin, on the sides of his head there are light-reddish purple spots, has salmon lips and black eyes and wears a white T-Shirt with a red speedo with white stripes in the side, He seems to hate old people, is unlikeable due to his aggressive behavior like most bikini bottom residents, Will throw hands if he feels necessary, is EXTREMELY Insulting at times, will beat up anybody, suprisingly has friends despite his shitty attitude