Lionhead Progress (1 Year)

Today I have officially had my goldies for 1 year, to which I feel so blessed to have seen them grow from 4 grams up to 159 grams in weight (and still growing!).
Pocky, Sumo, and Ramen (left to right)
My results show that in a goldfish's first year (12 months) it can gain roughly an average of 134g. Of course results will vary depending on how, what, and when you feed your goldfish, as well as the goldfish's living conditions.
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Another factor to note when raising, culling, and/or breeding goldfish is that generally any imperfections found when the fish is small will more than likely still be an issue as the fish progresses in age and growth. Color roughly changes with age, in proper conditions color seems to intensify with age however, some breeding, breeds, or health related issues can cause the fish to go through a more dramatic change in color (as seen with my goldfish Pocky).

Oddly after 5-6 months any major internal health problem/s seem to become apparent in these fish, such as having swim bladder disease. I was unable to find a cure-all for swim bladder disease and I'd like to hypothesize that this is something that can occur mainly due to poor breeding standards. Some swim bladder problems may be worse than others.