Looking for some help Naso Tang disease id

[Orr2003]

First let me say I know absolutely nothing about fish disease. But yesterday I noticed my blonde naso had a big black spot on his side and then today it has gotten worse with like a whitish ring around the black spot almost like a fungus of some sort. I have no idea how or why or what to do at this point so I am looking for some help here guys/gals.

The first four pics are from yesterday when I noticed the spot and the last pic is from today showing the whitish fungus around it.
Tang is acting normal and eating and grazing normal also.

 

[Dmorty217]

Brown is typically fungus and white is bacterial. You will need to go to a LFS to see what they carry for each to treat. It will involve removal of the fish to a hospital tank.

 

[Jdub968]

I would treat in a qt with furon 2 and Kanaplex

 

[JustinM]

It’s definitely a bacterial infection. Fungus is very rarely seen in saltwater. On top of that, he has ich real bad and the infection is more than likely a secondary infection caused by the ich. You will need to treat for that as well.