you can't tell until they're about 1 year old, until then it's impossible to sex them
here is a site on how to do it
http://www.bristol-aquarists.org.uk/goldfish/info/sexing-fs.htm
Hope that helps
Good luck
EB
2007-11-09 04:11:39
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answer #1
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answered by Kribensis lover 7
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Six goldfish? And I'm betting that you don't have them in a 120 gallon tank.... I'm betting that you don't even have them in a 60 gallon tank. Well, that isn't the question. It concerns me, but it isn't the question.
It is literally impossible to sex juvenile goldfish and it is highly difficult to sex adult goldfish and sexing can only be done when the goldfish is in its breeding period. Goldfish can reach breeding age as early as 1 year old, but more often the reach breeding age at around 2-3 years. In general, females can be somewhat larger around than a male, but as this is comparatively and subjectively determinable, this is not a reliable characteristic. When males are in their breeding period, which is only in the spring and/or after a very cold drop in water temperature, they will get tubercles, or little white pimply bumps on their gills and pectoral fins. Females anal vent will become convex. Males will chase females around, however, if there are no females in the tank, males will chase other males, so this too is also not a reliable characteristic.
Bottom line, if you want to know the sex for naming purposes, it's best to just make up your own rules about their sex or give them unisex names. If you want to know the sex for breeding purposes, pretty much, forget that. It is extremely difficult and nearly impossible to breed goldfish in an aquarium. Because you don't know which is which until they actually breed, you need stock a tank with a lot of fish, probably at least 10-20, to hope for any success, and most people simply cannot keep a tank large enough to properly accommodate that many goldfish. You really need to be an expert with years and years of experience of knowing exactly what it takes to "get goldfish in the mood" and the space to house them.
2007-11-09 13:26:38
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answer #2
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answered by Venice Girl 6
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I found that with my male goldfish, they got white spots on their gills when they were in season.However i do not know how to sex a female, sorry. Hope this helps.
2007-11-09 12:30:09
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answer #3
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answered by Anonymous
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there is no significant way of you being able too tell the difference between a male and a female goldfish. the only way that you are going to find out if you have male or female, is during the spauning season, when the female swell with eggs
2007-11-09 12:16:10
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answer #4
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answered by Anonymous
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you really cant till it reaches time to breed. the male will ususally get white spots on its tail and fins
2007-11-09 12:07:46
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answer #5
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answered by Anonymous
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