25+ Lifespan Of A Goldfish. To make sure your goldfish live a long happy life, a tank is the best habitat. Of course, in the beginning, when the ancestors of goldfish were first domesticated and kept in china, their lives weren't so easy.
Their lifespan can be up to 40 years if kept properly and they can reach up to 12 inches in length in a pond. You can do a lot to lengthen the lifespan of your goldfish. Having them live shorter than their natural lifespan is not the proof you are.
The oldest authenticated goldfish was fred, belonging to a.r.
The average lifespan of a fantail goldfish. Goldfish kept in a bowl have the shortest lifespan, 5 years being exceptional. Their lifespan can be up to 40 years if kept properly and they can reach up to 12 inches in length in a pond. It is a freshwater fish in the family cyprinidae of order cypriniformes.