Help with ,do i have a bully apistogramma

[T-rish]

Hi everyone ,
I not sure if the one male I have has killed off all except one possible female , I did have 8 no I have a small striped yellow ,it hides all the time and the blue coloured male , he swims around happily.
I am thinking about getting more ?, I am waiting for more caves.

 

[MacZ]

Which species do you have?
How big is the tank? (dimensions, not volume)
Is the tank decorated and structured correctly?
Why did you start with 8?
Can you post a picture of the tank and the fish?

Also: Fish behave as programmed by their natural behaviour. There is no thing comparable to bullying. Cichlids (Apistogramma are just one genus of many) tend to be territorial and aggressive within their respective species, so aggression is never something coming out of the blue and usually comes down to either stocking mistakes or a too small/unsufficiently structured tank.