What age do goldfish breed?

Goldfish can start breeding as early as 6 months old, but they usually reach sexual maturity around 1-2 years old.

However, it's important to remember that:

* Age isn't the only factor. Goldfish also need to be healthy, well-nourished, and have the right environmental conditions to breed successfully.

* Breeding can be stressful for goldfish, and it's not recommended for beginners. If you're interested in breeding, do your research and make sure you're prepared.

If you're concerned about your goldfish breeding, you can take steps to prevent it, such as keeping male and female goldfish separate or using a tank with a larger volume.