While goldfish tank inhabitants usually rub along just fine, occasionally, the hobbyist fish keeper can find themselves faced with the issue of fighting goldfish, or one fish appearing to bully others.
While disputes within the tank will often sort themselves out over time, in some cases, bullying fish can become a problem, and even cause harm to your fish, as well as increasing their stress levels.
In this article, we cover some of the most common reasons for bullying and aggression within the goldfish tank and suggest some solutions.