Female guppies are typically larger and have a rounder body shape compared to males. Their bodies are also slightly wider than males, particularly around the belly area due to the presence of reproductive organs.
2. Anal Fin
The anal fin is located towards the rear of the fish and is triangular or fan-shaped in females. In contrast, the male's anal fin is modified into a pointed, rod-like structure known as the gonopodium, which is used to fertilize the female during reproduction.
3. Coloration
Female guppies generally exhibit less vibrant coloration compared to males. Their body colors are often duller and may include a mix of pale shades, such as gray, beige, or light green. However, some female guppy strains may display brighter colors, but they are usually not as intense as those seen in males.
4. Size
Female guppies tend to be larger in size compared to males. On average, female guppies can grow up to 2.5 inches (6 cm), while males usually stay smaller, around 1.5 inches (4 cm) in length.
5. Absence of Swordtail
Male guppies are characterized by the presence of a sword-like extension on their lower tail fin. This feature is absent in females, making it another way to differentiate between the sexes.
6. Gravid Spot
Mature female guppies may develop a gravid spot near their anal fin as they become pregnant. This spot is an indicator that the female is carrying fertilized eggs and is about to give birth to live fry.
It's important to note that there can be some variations within guppy populations, so not all females may strictly conform to these characteristics. However, these traits are generally reliable indicators for identifying female guppies from males.