What is this on my fish

[jocquill]

 

[saltyfilmfolks]

#mods. Can we move this into the fish disease forum please and thank you.

@jocquill sorry I'm not the fish guy.

 

[melypr1985]

could be some kind of infection setting in. Is he acting differently at all? heavy breathing or flashing/scratching - anything off?

 

[Humblefish]

More info in this thread: https://www.reef2reef.com/threads/what-is-this-on-my-fish.265799/