Clownfish Aggression

[mandarins]

I've had two oscellaris clownfish for three weeks, recently the larger one has become more aggressive towards the smaller mocha storm clown. From the photos do the fins look nipped or anything? LFS won't give me a credit but will take the aggressor back.

 

[Jekyl]

Possibly. You can put the aggressor in an acclimation box inside the tank for a couple weeks. Gives the injured a break while maintaining contact.

 

[liddojunior]

They trying to establish dominance. I had a pair that were fighting a lot, and was worried about the small one being killed.
But I got them to finally pair.

I basically kept putting my smaller one in an acclimation box and then put them both in small mushroom box overnight and the next day they were paired up. There wasn’t really space for them to really get momentum to fight and think it forced the hierarchy