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. However, in general, crowntail bettas are known to be more aggressive than other types of bettas. This is likely due to their high level of energy and their territorial nature. If you are considering keeping a crowntail betta, it is important to be prepared for a more active and potentially aggressive 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. 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. Bettas are also known for being aggressive, and many people choose to keep them in single-fish tanks to avoid fighting. However, not all bettas are equally aggressive. Some types are more aggressive than others. The least aggressive type of betta is the plakat betta. 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. .

which betta is more aggressive