Danio rerio is a wonderful aquarium fish, unpretentious in content and completely peaceful. These fish are ideal for beginner hobbyists, but many experienced breeders choose to keep them in their tanks to maintain species diversity. Such a fish is always pleasing to the eye and does not cause any trouble. Before buying, a novice fish owner should definitely learn to distinguish males from females.
It is necessary
aquarium with fish, sharp eye
Instructions
Step 1
Only adults can be distinguished from each other by sex, since young fish are not yet sufficiently formed and are very similar to each other. If gender matters to you, be sure to purchase only adult, fully formed fish, only in this case you will be able to more or less accurately determine which of them is male and who is female. Also, make sure that all fish in the tank are the same age, as this greatly affects their size. Young females can easily be mistaken for males when compared to older fish.
Step 2
The most accurate criterion for sex determination in Danio fish is size. Look at a school of fish and try to compare them with each other. Females are usually larger and have a rounded abdomen. Males, on the other hand, are distinguished by a slender physique and a little undersized in size to their girlfriends. This structural feature is associated with the ability to produce eggs and bear fry, which directly depends on the size of the female zebrafish.
Step 3
Pay attention to the intensity of the color of the fish. The stripes on the body of females are paler and less noticeable, and zebrafish boys are usually brightly colored and shimmery very distinctly. This color is evidence of the good camouflage of the fish. Pregnant females are more clumsy and slow, so they should not stand out in the sea thickets or against the background of the bottom.
