The most common reasons why betta fish fight are: Territorial aggression - Male betta fish are known for being highly territorial. They will often fight other males entering their territory to protect their space. Bettas are generally aggressive. Males are generally more aggressive than females. It is better to keep male bettas separately. However, Male Bettas can be acclimatized to a community tank. Buy the male betta when it is young small as compared to the other fish in the tank. This ensures that it does not become aggressive. Are Betta Fish Aggressive? Betta fish are indeed known for their aggression. We will explore the reasons behind their aggressive nature and discuss how it is influenced by factors such as territorial instincts, breeding behavior, and environmental conditions. Are Betta Fish Aggressive Towards Humans? Male betta fish tend to be more aggressive. They set up territories that they defend with their lives. When another male betta is introduced into the tank, the original male will start to display warning signs. These warning signs include flaring their gills and spreading out their fins in an attempt to make themselves look like a serious threat. Male Betta fish are more likely to be aggressive when they see the other fish. An abundance of cover to break up the line of sight can hide the female, and in a big enough tank, they can both live peaceful lives without seeing each other often. Conclusion. In conclusion, Betta fish fight for various reasons, such as defending their territory, breeding behaviors, stress, overcrowding, and lack of food. To reduce aggression in betta fish, it is essential to provide enough space and hiding places in the tank. As a rule of thumb, avoid placing a male betta fish with another male. Betta fish aggression is a natural behavior that is important to understand in order to provide the best care for these beautiful creatures. In this section, we will explore the various aspects of betta fish aggression, including their natural aggressive behavior, territorial instincts, and dominance hierarchy. Natural Aggressive Behavior Poor Water Quality. Water quality can be a major factor in how aggressive a betta fish is. In general, poor water quality will cause betta fish to become more aggressive. This is because poor water quality can cause the fish to feel stressed and unable to swim effectively. Additionally, poor water quality can increase the levels of bacteria and Aggressive bettas are typically more aggressive than passive bettas, and are more likely to respond aggressively to other fish in their environment. Passive bettas, on the other hand, are typically less aggressive and are less likely to respond aggressively to other fish. There are so many variations that betta fish are usually classified by their colors, patterns, and tail type. Their aggressive behavior is often off-putting for newcomers to the hobby. However if properly fed and cared for, you shouldn't have any problems. 9sFbTa.