Mr. Gunther Fitz is Boating School's Superintendent. He looks at student's records. He is an important man to boating school. So far, he has only appeared in two episodes: Mrs. Puff, You're Fired and Life Insurance. In the former, he was the man who also hired Sergeant Roderick, a very strict boating teacher.
Mr. Fitz is a tall fish with a big, black mustache. He has a green shirt with a purple neck tie. His physique is quite solid. He has big, slightly droopy eyes and green pants.
- He was voiced by Dee Bradley Baker.
- He is the boss of Mrs. Puff.