Sword-bearers are one of the most popular species of aquarian fishes. These small fishes received such unusual name because of the extended lower beams on a tail fin reminding a sword. To distinguish a sex of sword-bearers it is problematic, but it is possible.
Instruction
1. Look at a tail fin. Males, as a rule, on a tail have "sword", i.e. the lower beam is considerably extended, at the self-check the beams are shorter.
2. Pay attention to a shape of a fin at the end of a paunch, it is a so-called, anal fin. At males it is extended in a tubule of an unusual form - gonopodiya. By means of this tubule the male impregnates caviar in a samochka paunch. At females the anal fin has the rounded-off form.
3. Sword-bearers of the most various coloring – green, gold, black, red became result of crossing with various forms of petsiliya. Do not try to distinguish a sex of these small fishes on coloring. The fact is that both females, and males of sword-bearers are painted equally.
4. Attentively look at small fishes. The female ready to bring whitebaits, at the end of a paunch has a noticeable dark stain, and the paunch becomes big and round. By the way, sword-bearers treat viviparous fishes, and their samochka can throw whitebaits even then when they contain separately, without males. It is enough to male to inseminate a female only once, and she will begin to bring whitebaits two-three times a year. So be ready to constant removal of posterity.
5. If you are serious to be engaged in cultivation of small fishes sword-bearers, it is necessary to know that formation of a gender of these fishes happens in two stages. At the age of about four months among small fishes the first medium-sized males are formed. Through some time a part of females can also turn into males that is surprising, among them there can be also females who already spawned. Such males, as a rule, turn out much more largely.
6. To avoid such strange thing as redefinition of a floor, provide the correct keeping of small fishes. As sexual redefinition though is considered characteristic of viviparous, but in most cases happens because of adverse conditions of keeping of an aquarium.