My McCosker Flasher Wrasse is showing signs of trouble. This morning I noticed a pale patch above his fin, but didn't think much of it. Now tonight it appears as the scales have fallen or been rubbed off, there is no coloration at all on that spot. I do not see white powdery appearances or "salting". He was added last Friday evening (so 3 days now), and was acclimated VERY carefully. Picture is below. Specific Gravity: 1.025 Salinity: 33.6 Temp: 80.7 All other levels at 0 (Ammonia, Nitrite, Nitrate). PLEASE HELP!!!