The Legendary Champ If you're wondering who or what Champ is, you came to the right place. The truth is, no one really knows. Champ might be a prehistoric reptile, fish, or mammal, living in Lake Champlain, or just an old myth or story passed down through the centuries to amuse the masses. Visit our Believer VS. Skeptic page if you want to attempt to answer this age-old question. Visit our other ...