My purple tangs mouth is white. It was not like that earlier today. The only thing that changed was I added a one spot foxface to the tank from quarantine a few hours ago. I noticed the color change after the foxface and the tang both ate nori from a veggie clip at the same time. It is not fuzzy like some kind of bacterial infection and the lack of pigment doesn't go too far up the face or on the lateral line like you'd expect to see with HLLE. He is still eating and acting normal. Can a purple tang change the pigmentation on their face to make it look like this, or is possible he was stung by the foxface while eating? I'm not sure what it looks like when a foxface stings another fish.
I'll attach a picture but it's not very good. I'm horrible at taking pictures inside the aquarium and after multiple tries this is the best I could get.
I'll attach a picture but it's not very good. I'm horrible at taking pictures inside the aquarium and after multiple tries this is the best I could get.