Brown spots on Anthias

[PDR]

I just got this sunburst anthias in from DD and it has some weird brown spots on one side of it. Any idea what it is?

This is the best picture I could get.

 

[Humblefish]

Too large to be turbellarians (black ich).

An infection of some sort would be my best guess: https://www.reef2reef.com/threads/bacterial-infections.191511/