I caught some video of my two ABF, one is male and one is female. They are the only two in the tank. I am not sure if this behavior is normal.
I know one is male because his analfin is split, or has an indentation in the analfin. The female has no indentation, her analfin is one whole piece. I am thinking aggression myself, sometimes the male chases her all over the tank, not just away from his little spot or territory. Especially at feeding times, he can be a relentless little jerkLooks like aggression to me .
What makes you think you have a pair ?