Hi, my lg 15-16 yr old Sailfin was just transferred to a 125 with dry rocks ( some sharp edges) aquascape. Virgin tank, no transfer of old established tank, cycled 2-4 months, Dr Reef Quarantined baby fish added 4 weeks before addition. Upon inspection, found this perfect round spot on her white stripe. I don’t freak out on marks on her or Regal, raised together and heal very quickly with yellow tang scratchers. In 40+ yrs of saltwater. Never saw this before. It’s been 2 weeks, no change and no change in her behavior. We feed everything Vette guy recommends.here’s pics, and thank-you! Debra


