Goldfish are one of the hardiest fish in the aquarium and in the wild. They have been known to live as long as 25 years and can grow as long as 2 feet. The original greenish-brown goldfish was native to East Asia. First bred and prized by the Chinese as an aquarium fish, its popularity brought it to aquariums around the world. Fish escaped from ponds and released from aquariums have made the fish common in the wild. Since they can withstand a wide range of temperatures, and unlike most tropical fish, can survive in cool water, wild populations of goldfish live in the Hudson River in New York and in the streams and ponds of the Midwest.
To learn more, read Choosing a Goldfish