So I picked up this firefish on Saturday and today I woke up to his right pectoral fin gone with a big red spot where it should be. He’s swimming with 1 “arm” basically. This morning he was resting on the sand bed but after feeding time he started to swim again and as of now he seems to be swimming ok. Should I put him in the quarantine tank to separate him from the other fish? Or should I let him be? Also will it grow back? I tried to get some pictures of it but he wouldn’t face the camera lol