Fish Bully?

[Cookie_the_Betta]

I just notice that my red platy has a nipped fin. Could it be possible that it's being bullied by another fish. I have 2 swordtail rasboras, they are the biggest in the tank. I have a feeling its them. What should I do?

 

[aaronnorth]

Make sure it's not finrot, the fins will have white patches which then look torn and ragged. When i had a bully, i put her in a breeding trap, the other fish then felt safe enough to swim around her without being attacked.

 

[Cookie_the_Betta]

No, its not fin rot. I have 2 platies and one of them is fine and seems accepted by the rest, but this other chubbier platy is not.

 

[chicklette]

Swordtail tails can be a bit aggressive so it’s possible. You may have to permanently separate. I would keep a close eye on the tank to see what’s going on to know for sure. If it is the swordtail you may need to permanently separate.