How long does it take for a goldfish to mature?

Answer 1

It takes 2 or 3 months for a houshold pet goldfish to mature, you can tell if it's a female by that time because they will have some white speckles on their lower fins. Plus, though the common goldfish lives for about 2 days in a bowl, but if you get a 10 gallon tank for it and feed it every morning and night until it's mature, then once a day when it's mature, it can live for a long time; I had a goldfish that I cared for ( the pet goldfish not pond goldfish), and it lived for 9 years! ( It just died :( ) But look for red and/or white spots, split fins, or enlarged eyes as these can be deadly but simply buying medicine from the pet store will save your pets life.

Answer 2

If by adult size you mean 'mature enough to breed' then they do that in 1 or 2 years and can breed at a couple of inches long. If you mean 'fully grown' Goldfish continue growing for their whole life which can be 50+ years and can get to 5 or 6 feet long and weigh many Kilos.

Answer 3

The amount of time it takes a goldfish can greatly vary. Most goldfish are full grown at the age of 2-3 years however they cannot reproduce until about the age of 3. For others, they are not fully grown until three years of age but can reproduce at only 1 year of age. You can generally expect your fish to completely grown and sexually mature at 3 years of age.