How can you tell the difference between male and female fish?

Question

I always wondered that, also im on about goldfish.

Answer 1

usually female goldfishes are bigger in size than the male goldfishe of the same age as they have eggs inside.

Answer 2

goldfish are one of the hardest fish to s*x

and it can't be done until they're mature enough, which is about 1-3 years of age

here is a site with pics on how to do it though

http://www.bristol-aquarists.org.uk/gold...

Answer 3

Male gold fish, shubunkin and carp are generally more slender in shape than females. Females tend to be chubbier and almost pear shaped. However, as fish do not eat in the colder months and survive off their fat reserves their shape will be misleading outside the breeding season. In the warmer, breeding months the males develop distinctive spotting around the gills and on their heads. These little bumps are white and quite noticeable during the breeding season. Watching their behaviour at this time will also offer clues to gender. The male fish try to stimulate breeding by chasing the females around the pond or aquarium. They deliberately bump into the females to stimulate spawning. However, if you wait until you see these signs it will be a little late to start a selective breeding programme. Once the female has spawned the male will quickly deposit his milt over her eggs. Fertilisation only takes 20 minutes and so, by then, it will be far too late for the fish keeper to intervene.