Growth on Flame Angelfish?

[dmmitchell]

I’ve had a Flame Angelfish for a couple of months, developing a small growth near its mouth/gills. I’ve tried to attach photographs here.

Any idea what it is, or how I can treat it? It doesn’t seem to be bothering the fish, and doesn’t appear on any others in the tank.

 

[Jay Hemdal]

It isn't likely to be anything infectious to other fish. It looks like it involves the fish's cheek spine. I see that a lot from net damage. Maybe it got into a tussle with another fish? I would just wait and see how it progresses because the only treatment would be to move the fish to a treatment tank and dose with antibiotics - and that's hard to do, and sometimes, these issues go away on their own. Signs that it needs treatment is: rapidly increasing in size, the fish going off feed, or starting to breath fast.

Jay