In my experience certain females can be just as aggressive as males to other females in the same tank. My female Salvini raises hell every time I put a mirror on the side of the tank, she spends as much time as the male displaying to her own reflection. Also, my female Blue Acara desperately tried to kill a pair of Severum I added to the tank, and then she became the dominant fish over all the other fish (including larger males), this is the reason why I gave her away. I think the perception that females are less aggressive is based on the fact that usually they're smaller and are often bullied by much larger males... so they look "weaker" to us.
I read an article here not too long ago that argued females will pick up fights w each other regardless of size and dominance, unlike males which are more likely to pick up fights with similarly-sized, equally dominant fish... in this case, when the size difference is larger they are less likely to do serious damage because the smaller male will give up rather easily, but females will keep fighting.
I read an article here not too long ago that argued females will pick up fights w each other regardless of size and dominance, unlike males which are more likely to pick up fights with similarly-sized, equally dominant fish... in this case, when the size difference is larger they are less likely to do serious damage because the smaller male will give up rather easily, but females will keep fighting.
