Did I injure my catfish?

I have a Tropical fish aquarium, and I have 1 bala shark, 1 blue guarmi, and 2 catfish. I recently noticed one of the catfish got a little “bold” and started to bully the bala and other catfish, but not the guarmi. so I tried to seperate the bully catfish to relieve stress on the others. Apparently the fish net got hold of the catfish’s front fin, and in an attempt to free him, I think he (we, not dodging blame) hurt his fin. he moves around and breaths normally, but you can blatantly tell he’s troubled to move his fin. I wanna know what you all think I should do. He was only doing harmless bullying, not biting or anything, I dont want the worst outcome….