The wound is a few days old and appears to be getting bigger. I just noticed the red bump on the base of his fin today. I know the picture isnt very clear, but its the best one I took out of about 20.
Any puffer guru's know whats up with the sores? He appears to have some sort of irritation on the other side in the same spot as the open wound. He's the largest fish in the tank and everyone gets out of his way, I seriously doubt that another fish did this.
Any help with diagnosis and treatment would be appreciated