Glenn 32 Posted November 21, 2014 I know fish never stop growing but I was wondering in general, how many years until my Ryuins get full grown? 0 Quote Share this post Link to post Share on other sites
Daniel 5,668 Posted November 21, 2014 How are you defining full grown—of sexual maturity or something else? 0 Quote Share this post Link to post Share on other sites
Glenn 32 Posted November 21, 2014 I'm speaking of when they get to there general largest size. My goldfish are doubling in size every 6 months so I must be doing something right. 0 Quote Share this post Link to post Share on other sites
Mikey 6,780 Posted November 21, 2014 (edited) It depends on mostly genetics of how large a fish will get. A big Role is water quality and food. Some of my fish are two years old and not near full size yet. One is only 4 inches in body length, but 8+" including tail. She still has some growing to do as do my others. Edited November 21, 2014 by Mikey 0 Quote Share this post Link to post Share on other sites
Glenn 32 Posted November 21, 2014 I have a TON of filtration and my water parameters are always good. They get New Life Spectrum Goldfish Forumla 4 times a day. Goldfish's "gullet" for lack of a better term can hold about the size of their eyeball so that's the amount I give them 4 times a day. There really growing fast. 0 Quote Share this post Link to post Share on other sites
Daniel 5,668 Posted November 21, 2014 (edited) I think largest size is rather ambiguous. Like Mikey said, genetics are an important factor. To vaguely borrow from a German idealist, the potential of a seed to become a plant is inherent, but it does not mean the seed will become a plant. Goldfish do most of their growing in the first 2-3 years of their life. When growth starts to slow down significantly I would consider that fish 'full grown'. I think if your fish are growing and you are not overfeeding, they are healthy and swimming happily, then that is all that should matter. Edited November 21, 2014 by dan in aus 0 Quote Share this post Link to post Share on other sites
OrandaMan 0 Posted December 6, 2014 Im wondering which one is male and female 0 Quote Share this post Link to post Share on other sites
hassan.zidan 43 Posted December 6, 2014 Fish need space, high quality water and food as needed. I rich about 1 KG wight for my GF in one year (earthen pond ) 0 Quote Share this post Link to post Share on other sites
shakaho 6,312 Posted December 6, 2014 Some rough estimates are that goldfish reach about half their ultimate length between 1.5 and 2 years of age. After that,growth in length slows with every year, with most fish growing little if at all in length after 5 years. Older fish do get thicker and taller and fins may continue to get longer in older fish. Maximizing growth is part of the process of grooming a potential show fish. The basic idea is to feed lots of high-quality food, multiple times a day (usually by machine) while providing lots of clean water, since the fish will be producing vast quantities of waste. I don't think genetics has much to do with it. Some runts may have sub-lethal mutations that lead to failure to grow, but most seem to be perfectly healthy. People have tried to produce mini goldfish by breeding runts to runts without success. 0 Quote Share this post Link to post Share on other sites
Glenn 32 Posted December 12, 2014 Well that explains why mine are growing so fast! I just wanted a ballpark so I can know what year to breed the guys? Do they have more fry the older they get/ 0 Quote Share this post Link to post Share on other sites
DieselPlower 2,123 Posted December 12, 2014 I wad also going to ballpark 5 years. 0 Quote Share this post Link to post Share on other sites
shakaho 6,312 Posted December 13, 2014 Most goldfish are ready to spawn at about one year of age. I have had fry from parents who were not more than six months, but life goes faster for cold-blooded critters in FL. Breeders say that goldfish produce their biggest spawns starting at 3 years, but I'm not sure when they decline. 0 Quote Share this post Link to post Share on other sites
hassan.zidan 43 Posted December 13, 2014 (edited) Born on 15th Sep -14 Edited December 13, 2014 by hassan.zidan 0 Quote Share this post Link to post Share on other sites
landmouse 192 Posted December 13, 2014 Wow, they are beautiful! What is the deep magenta on their gill covers? 0 Quote Share this post Link to post Share on other sites
Glenn 32 Posted December 14, 2014 those arnt pictures of my fish but they are the same size. 0 Quote Share this post Link to post Share on other sites
ichthius 122 Posted December 14, 2014 (edited) Born on 15th Sep -14 This is the fastest I've ever seen fish get tubercles.Wow, they are beautiful! What is the deep magenta on their gill covers? They are lacking guanine, so the color is the gills. Edited December 14, 2014 by Ichthius 0 Quote Share this post Link to post Share on other sites
landmouse 192 Posted December 14, 2014 I'm a total goldfish n00b, so I had to look up "guanine." Thanks for posting the pictures, hissan.zidan, and for the explanation, Ichthius! 0 Quote Share this post Link to post Share on other sites