This will be useless unless the fish are at least a year old.
The only way you can learn to spot male and female goldfish is by closely observing known males and females and noticing their various traits. A pet shop could be a nice place to learn this.
BUT you could also look out for these signs :
1. Midline ridge: male goldfish have a ridge running through the back of pelvic fins to their vent opening on the underside. The ridge is either completely missing or smaller in females.
2. Firmness of abdomen: The area between pelvic and anal fins is pliable for females but very firm for males.
3. Shape of the vent: Though difficult to figure out, the female vent is rounder and convex, whereas the male vent is thinner and concave.
4. Shape of the pectoral fins: Male pectoral fins are pointed with stiffer leading ray and female pectorals are rounded, shorter with finer front fin ray.
5. Features: females are brighter colored and are more active. This could be a difficult way of pointing out a female but you could try!
6. Check out: One theory says that you can introduce a known female into the tank and watch for the reaction of fish. Males will check out the new fish but the females will show no interest!
Good luck :]
2007-01-07 05:12:47
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answer #1
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answered by Anonymous
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well on live bearers such as platies and mollies.. the male fish has a stick like organ underneath it's belly which is called a gonopodium. we can call it a thingy. On swordtails males are the ones with the sword. On guppies the male is the one with the more colorful tail. always remember that all male livebearers have a gonopodium.On goldfish the only way to tell a male is during breeding season in which the males will develop these little dots on their cheeks.If one cheek have 5 dots on it then the right cheek should also have 5 dots on it too. some african cichlids have a different color from the male and females.on convict cichlids the female has a red belly and the male doesn't.
2016-05-23 02:49:58
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answer #2
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answered by Anonymous
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Sometimes you can tell by the color. Males tend to be smaller and showier. But that is not for all breeds. To be sure, determine the kind of fish you have and search the internet for that breed. Most likely you will find what you want to know. If you can't find the information you need, check with your fish source and they should be abel to help you.
2007-01-07 02:05:04
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answer #3
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answered by MT C 6
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What type of fish is it?
is it a goldfish?
If it is i found a site where it tells you how you can determine the gender but its not that easy to determine but you could ask a vet if this site didn't help you. Go down the page until you get to somewhere that says Determining a Goldfish's Gender
2007-01-07 02:03:49
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answer #4
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answered by nilo 3
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You won't be able to tell until they start their mating season in the spring. Male goldfish get tiny white spots on their gills. There is no other way of telling.
2007-01-07 07:57:59
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answer #5
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answered by lellylurve 3
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when they are ready to breed the male gets white spots on the gills;these are known as sperm tubercles,the female develops a swollen body and swims slightly "off balance", this applys to cold water fish,I don't know if its the same for tropicals........I've just read your add on Susan,the fish that I used to have were goldfish so my answer applies to yours.
2007-01-07 02:06:41
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answer #6
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answered by Anonymous
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you can only tell with gupys but the more fancy looking fish are boys and the more boring in girls strange but true
2007-01-07 03:53:16
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answer #7
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answered by Anonymous
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Try going to petsmart they have always answered these questions and can use a fish in their tanks to show you.
2007-01-07 02:14:22
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answer #8
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answered by Austin C 2
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Males chase the females when the female is ready to spawn. You will see that the female is fatter.. no chasing=no difference.
2007-01-07 05:41:01
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answer #9
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answered by Spanner 6
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it is very hard to sex goldfish.a professional breeder can help you better,if you email one of them they may tell you the difference they must be a certain age before you can tell the sex,
2007-01-07 06:05:56
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answer #10
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answered by stephen eblue eyes 4
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