Ocellaris Clowns Fighting?

[Nrapp33]

I have had a pair of Tank Bread Ocellaris Clowns that I have had for 6 months. They where in a tank full of ocellaris. One has grown larger than the other. Now the larger has began attacking the smaller (male). He is submissive but still getting a beat down. He has almost lost one of his pectoral fins. I tried catching her but couldn't get her without removing all the rock work. I did get him and pulled him out. He is in a qt tank. I got him out a couple days ago and he is fine.

Questions are this:
-why was she beating him up?
-can I put him back in?
-what should I do?

Thanks

 

[ccCapt]

Questions are this:
-why was she beating him up? The bigger female is establishing her dominance.
-can I put him back in? If you want to try and pair them up, yes.
-what should I do? How big is the tank they are in? If the smaller 1 has room to run and hide the fighting should stop after a while.

 

[Nrapp33]

They are in a 55g. I will try reintroducing him. I am going to move the tank in the room soon so at that time I will redo the rock work so maybe that will help as well.

 

[Ibrahim]

There is a likely chance that the smaller was a male and changed to a female in the tank with all the other clowns. And since the larger is also a female they will both fight. When a clown becomes a female it cannot change back into a male.

 

[Nrapp33]

They were both small when I got them and very peaceful existence till just now. Could the fighting be delayed?

 

[Hinds04]

If they are small and were in the same tank... you have one male and the other (bully) is in the process of changing I would say. Sometime they are just mean. Fin nipping is not good though