How Can You Tell A Male Guppy From A Female Guppy?

Some think it is unnecessary to know the difference between male and female guppies until they see their babies and find it difficult to differentiate. 

How Can You Tell A Male Guppy From A Female Guppy? The easiest way to check the sex of a guppy is to look at the gravid spot, if it is dark it means the guppy is a female. Other ways to check the sex it to look at the dorsal, caudal and anal fin

How can you tell a male guppy from a female guppy?

Below Are Ways To Tell The Difference Between A Male and Female Guppy Fish

The Gravid Spot

This spot looks dark, found at the dorsal region, and close to the tail. Once you can locate this spot in a guppy fish, it means it is female because

male ones don’t have the gravid spot. This spot is more pronounced in a female that is pregnant, as it grows larger compared to when they are not pregnant.

The eyes of the fetus developing in the mother’s womb pressing against the belly formed the gravid spot. Once the fries are delivered, the blackspot starts becoming light until it fades away.

The Gravid Spot

The Guppy Fins

There are various types of fins in fish generally, and guppies are not exempted. They have dorsal, caudal and anal fin.

i)  Dorsal Fin:

Close to the fish head is the dorsal fin. The sizes of the dorsal fin differ in both male and female guppy fish. Compared to the male, females have small and not too long dorsal fins while males have big fins. While swimming, make dorsal fins appear on the water, unlike the female dorsal fin.

  ii) Caudal Fin:

This is also called guppy’s tail fin. When you see a vast, colorful like the rainbow and prolonged kind of fin in guppies, just know they are males. Females have short and not too wide caudal fins.

iii) Guppy Anal fin:

You need to hold a guppy fish to see their anal fins; it is located below the tail. The significant difference between the anal fin of

male and female guppy fish is the shape. When you see a rectangular like shaped fin then that is a female guppy fish, while those that have pointed anal fins are the males.

The Guppy Fins

It is until the male gonopodium(anal fin) develops that is when can start to have intercourse by inserting their anal fin into female guppy’s anal vent. The female pregnancy occurs between 21 – 30 days, female guppies store semen (sperm) for years so that they can impregnate them self in  the future.

Don’t be disturbed if your fries lack anal fins because it will develop with time; it is used by the males to mate and impregnate the female guppy fish when it is matured. 

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The Color of Guppies.

It will surprise you that male guppy is more colorful/beautiful than females. You might mistake them for a chameleon if you are seeing an

adult male guppy fish for the first time. They have colors like orange, indigo, violet, spot, and different shades of stripes.

The awesome male color is their selling point, female guppies are attracted to them, and from there mating starts. Do you know there are few female guppies that are as colorful as the male ones though they are hardly seen but  exist.  

This is why gender is still the best way to differentiate between male and female guppies. Checking the tail, the breeds, and physical markers to get accurate gender of your guppy fish is the best.

Water Can Help Detect The Sex of Guppy Fish 

You will be surprised if you practice this yourself, the outcome is accurate. The PH level of the water can make the fries male or female depending on your preference. Read this carefully. 

If you want a male guppy fish: raise the PH level of the water to above eight and leave it for a few hours, then you have your male guppy fish. For female guppy fish, reduce the PH level of the water to come below 4 for six hours, then you are assured of female fries; it works like magic. 

One of the ways to know the sex of guppies is, by adjusting the PH water of where they are kept as fries. 

The Guppy Fish Size: 

Unlike humans, remember male guppies are often more beautiful than the female ones. In terms of size, female guppies develop bigger compared to males. Matured female guppies are mostly seen to be between the size of 4-6cm, while male guppies range between 1.5cm to 3cm in terms of body size.

And there you have it, I believe you will be able to differentiate between male and female guppy after checking the features listed above.

Knowing the difference between male and female guppies will help you control birth and population in particular; if you don’t know the difference between them, you will not be able to differentiate them in different tanks, and it will be hard for you to control the population. 

It is not rocket science or takes years of experience to know the difference, but it is challenging to know the gender of guppies when they reach adulthood. 

The Guppy Fish Size

Other Information

In most guppies, gravid spot develops seven days after birth, and you will need a flashlight to locate the gender if you check seven days after birth before they are adults.

One female guppy in a tank of male guppies might be overburden due to intercourse, the male will rush to mate her one after the other, and she won’t have enough energy to resist them. Then your tank/pond will be overcrowded with fries you did not necessarily plan to have.

Moreover, If there is a male guppy in a tank of female guppies, then the male will mate with each of the female one after the other in quick succession. Then your tank/pond will be overcrowded with fries you did not necessarily plan to have just the same way it is stated in the last paragraph.

Once the two sexes are stocked in a tank, this cycle continues. Guppies develop to adulthood within one week; mating and pregnancy are assured during this period are not separated before they are a month old. 

There are various ways to tell the difference between male and female guppies like their body shape, scale/skin color, and type of fins.

There are other interesting topics you should check out like Can You Keep Guppies In Cool Water and Treating And Preventing Guppy Constipation.


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