When Does a Common Goldfish Grow Up?
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👁 7753 views 💬 33 replies Nutrition & Diet
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Expert Answer
A common goldfish generally matures about 1 year after hatching, with timing by environment and care; with good conditions and ample food, faster ones mature at 7 to 8 months. After maturity they go into heat each spring, so if you plan to breed, pick healthy, well-shaped fish as parents with a 1:2 female-to-male ratio.