Opaline gouramis, also known as three-spot gouramis, are generally peaceful fish. However, their behavior can vary depending on various factors such as their age, gender, and the tank environment.
As juveniles, opaline gouramis are typically peaceful and get along well with other fish in a community tank. They are known to be relatively tolerant and can coexist peacefully with a variety of tank mates. They are often seen swimming calmly and exploring their surroundings, adding a touch of elegance to the tank.
However, as opaline gouramis mature, the males can become territorial and aggressive, particularly towards other male opaline gouramis. This is especially noticeable when there are limited hiding places or if the tank is too small. It is not uncommon for male opaline gouramis to engage in fin-nipping, chasing, and even physical fights with other males. It is important to provide plenty of hiding spots and ample space for each fish to establish their territory.
Another factor that can contribute to aggression in opaline gouramis is the presence of smaller, more timid fish in the tank. The opaline gouramis might view these smaller fish as potential prey or intruders, leading to aggressive behavior. It is advisable to avoid keeping small, delicate fish with opaline gouramis to prevent any harm.
It’s worth noting that not all opaline gouramis will become aggressive. Some individuals may maintain their peaceful demeanor even as they mature. However, it is always better to be prepared and provide them with an environment that minimizes potential aggression.
In my personal experience, I have kept opaline gouramis in a community tank with other peaceful fish such as tetras and catfish without any issues. However, I have also witnessed aggression between male opaline gouramis when they were kept in a smaller tank with limited hiding spots. This led me to provide them with a larger tank and more hiding places, which significantly reduced the aggression.
To summarize, opaline gouramis can be peaceful and make a beautiful addition to a community tank when they are young. However, as they mature, male opaline gouramis can become territorial and aggressive towards their own species and smaller fish. Providing ample space, hiding spots, and avoiding keeping delicate fish together can help minimize aggression in opaline gouramis.