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First of all, the question is confusing since a male goldfish could never be female. I'm going to assume you mean how to tell the sex of a goldfish. Following are some methods that can be used to recognize the sexes but even these are useless unless the fish are at least a year old, i.e., have attained sexual maturity. 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! If all else fails, put a known female in the tank. A male will check her out. A female will ignore her.

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15y ago
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14y ago

Feel the head and cheeks. If it feels like sandpaper, it's a male. You may not be able to feel this until spring time though. A female koi will feel slippery during breeding season.

also most males are longer and more slender and the females carry eggs and they wil have a "bulge" near there stomach regon

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13y ago

Male guppies are smaller have larger more square shaped tails are more colorful.Females are larger with near circle shaped tail some can have bright colors but most of the time this is only on her tail.

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14y ago

If you have immature koi, it is almost impossible to tell the difference between male and female. They develop characteristics particular to their gender as they age, and even more so during mating periods.

Adult males will be slender and torpedo like and will dart around with a quick turning movements with speed. They will also tend to be shy when it comes to feeding time and will take longer to feed when food is floating on the surface.

During mating season, males will develop breeding tubercles on their head, flanks, and tail giving them a rough feel as opposed to the normal slippery feel.

Females do not develop tubercles and will not keep the slender look to them during mating season as the eggs swell in the ovaries. They also are not nearly as timid and often will eat voraciously as soon as the food hits the water.

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Q: How do know if a guppy fish is a male or female?
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How can you get your female guppy fish pregnant?

All that is needed is a male guppy in with her.


Will a female betta fish mate with a male guppy fish?

No.


How can you identify a female guppy fish from a male guppy fish?

Female guppies are larger and plainer. The male is distinctive for his long, flowing, colourful tail and generally brilliant colours.


Your guppy guppy you raised you thought was a female but now has the gordium of a male same length of a female but the pointy thing of a amale and it dont breed what is it male or female?

If the fish has a "GONOPODIUM" it is definitely a male.


Will two guppies from the same fish breed?

A male guppy will fertilise any female guppy it is in with. Mother,sister, no relation, whatever. It doesn't know and it doesn't care. That is nature.


How do you tell the difference between a fat female guppy fish and a pregnant guppy fish?

The Gravid female will have the dark "gravid spot" in front of her vent. I can however assure you that if there has been a male in the same tank with a female guppy for any reasonable length of time she will be gravid.


Can guppies have more babies after male dies?

No, unless a) the female fish got pregnant before the male died, or b) you buy a new male guppy and put him in with the female.


Why does male guppy follow female guppy?

It might want to mate with it.


Why is your male guppy swimming with an arched back a little chubby and is not eating?

Your male guppy is female and with child.


Is the male guppy more beautiful than the female guppy?

yes there are. that is how they get mates.


How do you determine male and female guppy fish?

You can find the gender of a guppy by looking at the anal fin. The anal fin is the closest fin to their tail below them. On a female it will look like a normal fin but on the male their will be 2 long skinny fins. The male is also much more colorful.


Does a female guppy need a male to breed?

Yes, you must have a male and female to breed.