tang blotchy coloration

Powder Blue has been doing great for over a month but unsurprisingly came down with ich, so he was moved to quarantine. He has now developed numerous dark splotches all over him, but they seem mostly on his fins. Is this a bacterial infection? They are splotches, not dark pinpoint specks like...

I just bought a blonde naso tang and it have big white spots on him, doesnt looks like ich. Put it in tank, saw it hiding in the corner and all skin colour very dark. It started moving and suddenly flash very fast across the tank. Should it be alright?

Hello all, sorry for this being my first post, don't want to seem like a noob but I've been lurking and learning from here since 2019, finally made an account today because I NEED HELP! I've searched high and low for answers for this issue with my purple tang, can't quite figure it out. Quick...

My Scopas had an issue with his color shortly after introducing him. This persisted for a couple weeks then seemed to normalize. He would appear to be his true color while lights were on and when the lights were out he seemed to turn opaque? A couple weeks ago he appeared to be going through...