Two male Betta fish in the same tank are a bad idea because of their aggressive and territorial character. Many fish owners have succeeded in introducing a male Bota into a tank with several Betta females. However, before the male can be introduced into a tank with a female, the fish must be kept apart.
We are not trying to squeeze an entire school of fish into a tiny aquarium in a shop, but we are not imitating the habit of keeping Betta in sororities.
On the other hand, females can live in a hierarchical society known as a sisterhood in which a Betta asserts herself as the alpha of the tank. They can be even more aggressive than male Bettas, but in this case, female Botas tend to take up a little less space than their male counterparts, so pet stores sell their ready-made ranges to help you get started. Due to the fact that female bettas can be very aggressive when they live in a sorority, we recommend quarantining their offspring before they are released to avoid a real version of the Mean Girls in your pool.
As far as they go, Siamese fighting fish are an aggressive species, and males can surprise you by attacking Betta females. When a male is kept in an aquarium, they fight with each other, hence the common name “Siamese Fighting Fish.”. Two males of the species fight for the protection of their territory and should never be placed together in the same tank.
Give your Betta fish plenty of hiding places to escape when they get stressed, and make sure the tank is big enough for your fish. If you put more than one female Betta in a tank, don’t worry when you start torching her gills (my crescent moon does this with her 2 veils and when she’s done, she tells her alpha that she’s in charge and won’t go anywhere unless you’re worried).
I have a male crown tail Betta, a goldfish, a snail, and the goldfish hid in a lot for two days and I was fine, and I have the other 10 gallon tank, but today I removed the Betta from it so that it can continue to hide in the shell and not eat or swim around (it depends on beta).
In this scenario, the female becomes dominant in the fish tank and begins to act aggressively on your beta. This is a betta-sister disease that can spread like wildfire and infect the entire fish tank.