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A genus of the family wernerite. They have a long torpedo-shaped body and a conical head. Floating head down. Upper mouth, so to pick up food from the bottom, and.…

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Why are my guppies fighting each other?
Neil Monks will give some advice to the reader about possible skirmishes between male guppies. Question. I have a 65-litre (14 gallon) full-cycle aquarium and 4 male blue guppies live…

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Why are my guppies fighting each other?

Neil Monks will give some advice to the reader about possible skirmishes between male guppies.

Question. I have a 65-litre (14 gallon) full-cycle aquarium and 4 male blue guppies live in it. I recently added four more male guppies to the aquarium, this time red guppies, and it looks like they’re hitting on each other, but I don’t know if they’re fighting.

I’ve read that male guppies tend not to bother each other. Why doesn’t that apply to my fish? Will they stop behaving like that after they get used to each other? If not, would they cause each other serious injury?

Answer. I think different people have different experiences of keeping guppies, and it all depends on the number of individuals. When kept in large groups (as in a pet store, for example), males tend to cause only minor damage to each other. Perhaps because individuals cannot constantly attack or be attacked. But in smaller groups, especially on two-three individuals, can be discern, that one of males becomes “the main” in aquarium, often is assaulting other males, contained with him.

Interesting results were obtained by observing another species-Amecas-which are almost absent in the wild, but for decades they are kept in aquariums.

Males of wild individuals and descended from recently caught fish spend most of their time eating algae, and only occasionally fight with other fish. And grown in captivity contrary, spend on eating algae quite a bit time, and greater part of time fight.

Why? According to one hypothesis, the reason is that we feed the fish good food, and it only takes a few minutes a day, so the fish have more time for other activities. At the same time, males, who spent more time fighting, were preferred by females, since the alternative behavior-search for food – did not help in this.

The more aggressive the male, the higher his chances of mating with the female and passing on his aggressive genes to the next generation.

At the same time, wild species can not afford it, because their food-algae, is not so rich in nutrients, and they have to eat them for hours to get the right amount of calories. Also, wild individuals are very economical with energy and will not drive away another male unless absolutely necessary. Aggressive males have a much higher chance of starving to death before mating than more careful and calm individuals who accumulate energy and can use it at the right time to impress the female.

It’s possible that something similar is happening to guppies, and given the way they are bred, guppies ‘ genes can be highly jumbled and distinct. Therefore, some broods may be more aggressive than others, even within the same species.

And given factors such as the size of the aquarium, the number of males, the availability of females, and the presence or absence of potentially dangerous neighbors, the behavior of male guppies is very difficult to predict.

In short, Yes, male guppies fight, and Yes, if their fins are permanently damaged, it can lead to the formation of fin rot. Once the hierarchy is established, the guppies can calm down, but you can’t be absolutely sure.

Increasing the number of males can improve the situation, as well as adding floating plants to the aquarium, which will allow guppies living near the surface to hide (the simplest option is an Indian fern or an Amazon frog).

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