The world's largest goldfish is from right here in Goodfield. Mia Knapp's parents purchased this goldfish from Walmart for 99 cents when Mia was little. They eventually put it in a private pond and it has grown from about 1 inch to 25 inches making it the world's largest. The current record is 18.7". We have been trying to catch him for over a year to see how big he is.