So I have had this firefish in my tank for a while now, and I just noticed that his fin started to split... Not sure if its something I should be worried about or not... Anyone ever dealt with this before???
Hmm as long as he he's eating and acting normally you shouldn't worry. Mine once looked like his dorsal fin snapped at the top but it either fell off or something cuz he looks perfectly normal now. I'd bet he may have ripped it on the rock work or is getting a little bullied. Just watch his behavior.