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This article was co-written by Pippa Elliott, MRCVS. Elliott is a veterinarian with more than thirty years of experience in veterinary surgery and pet treatment. She graduated from the University of Glasgow in 1987 with a degree in veterinary surgeon. She has worked at a veterinary clinic in her hometown for more than 20 years.
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Guppies are quite popular aquarium fish because they have very eye-catching colors. Although guppies are easy to feed on newly born young, they will reproduce very quickly after mating. You can tell the sex of guppies fairly easily by body shape, fins and color when they are at least a week old.
Steps
Check the body shape and color of the fish
- During pregnancy, the female’s body will swell up like it’s stuffed and even lumpy. The closer to the date of birth, the more rounded the female’s body will be. [1] X Research Source
- You can use a magnifying glass to make it easier to see the body shape, size and color of the fish as they swim in the tank.
- Note that the many colors and patterns on the fish’s body are not a sure sign of a male fish. The females of many guppies are also quite colorful, so in addition to color, you will need to rely on a number of other physical characteristics to determine the sex of the fish. [3] X Research Resources You can look up guppies online to find out what kind of fish you have and to see the different colors and patterns on their tails. [4] X Research Sources
- During pregnancy and closer to the due date, the female guppies’ pregnancy spots become darker and larger. As the baby nears birth, you can even see the fry in the mother’s belly near the spot where the pregnancy dot is located. After giving birth, this spot on the mother’s belly will be lighter in color and will darken again when pregnant again.
Observe the fins of the fish
- In contrast, the anal fin of the female is shorter and looks like a triangle. The female’s pregnant dot is located just above the anal fin.
This article was co-written by Pippa Elliott, MRCVS. Elliott is a veterinarian with more than thirty years of experience in veterinary surgery and pet treatment. She graduated from the University of Glasgow in 1987 with a degree in veterinary surgeon. She has worked at a veterinary clinic in her hometown for more than 20 years.
This post has been viewed 34,805 times.
Guppies are quite popular aquarium fish because they have very eye-catching colors. Although guppies are easy to feed on newly born young, they will reproduce very quickly after mating. You can tell the sex of guppies fairly easily by body shape, fins and color when they are at least a week old.
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