I have a purple tang that is about 18 months old. It eats great, very active, never shows any sign of stress or issue. But then today when I turned the lights on I noticed a white patch in its nose/face. I am attaching pictures but it does not look like ich or velvet that I have seen in the past. Has anyone seen anything like this before? Maybe a bacterial infection? The white spots in the first picture are food, I was feeding when I took the pictures; they are not on the fish itself.
![20221223_133414.jpg 20221223_133414.jpg](https://test.reef2reef.com/data/attachments/2873/2873379-5784896ff5a79a05406cc43647bee825.jpg)
![20221223_133431.jpg 20221223_133431.jpg](https://test.reef2reef.com/data/attachments/2873/2873378-668966d61e84caeda68493f707606edb.jpg)
![20221223_133414.jpg 20221223_133414.jpg](https://test.reef2reef.com/data/attachments/2873/2873379-5784896ff5a79a05406cc43647bee825.jpg)