male aggression

My little merlin seems to have gone through a behavior change, the last time i created a thread it was because he wouldn't flare. He finally did flare, and after that he was still his regular chilled self. And then today randomly while i was playing with him he flared at my finger, i obviously...

I have two males that have been housed in a divided 1/2 gallon tank for the last few months. I got them at 8 weeks and they are now 4 months. I bought a new 2.5 gallon tank with a filter and light fixture, to give them more room, I put my short fined male in first and left my blue male in a...

Hi all, my male doesn't really seem to notice my juvenile female betta unless I push their tanks together (she's still in quarantine from arriving from petco). When he finally does see her, he flares at her, and I think the poor little girl is scared off - she swims to the other side of the tank...

Hi, I recently got this female which I'm hoping to use as one of my breeding pair. Does anyone know what type she is? Sorry that the picture is not very clear. She is quite small so I think she is around 3-4 months old? When I put her in a clear container with the male (delta) the male seems...