You will need
- fish-eye precision
Instruction
1
To distinguish from each other based on sex only adults, because young fish is not yet sufficiently formed and resemble each other very much. If you gender matters, be sure to purchase only the adult, fully formed fish, only in this case you can more or less accurately determine who is male and who is female. Also note that all the fish in the aquarium were the same age, as it greatly affects their size. Young females can easily be mistaken for males when compared with older fish.
2
The most accurate way to determine the sex of the fish Danio is the size. Look at a bunch of fish and try to compare them. Females are usually larger and have a rounded abdomen. Males differ slender physique and slightly nedotyagivaet to their girlfriends. This feature of the structure lies in the ability to produce the eggs and nurture the fry, which depends on the size of female zebrafish.
3
Please note the color intensity of the fish. Stripes on the body of the female paler and less noticeable, and boys zebrafish usually brightly colored and shimmer very clearly. This color is a good camouflage fish. Pregnant females are more clumsy and slow, so should not stand out in the sea the Bush or on the background of the bottom.
Note
Sometimes it is very difficult to look at individual fish as Danio prefer to chase each other through the aquarium and keep the flock.
Useful advice
Try to choose fish with natural light and in aquariums, in which there is soil and living vegetation. It is under these conditions, the difference in color is most noticeable.
