Is something wrong?

[Jkhall]

One of my daughters glow fish has what appears to be a small raised bump on its bottom fin. It’s the same color as the fish. It seems to be eating normally and the last water change was almost a month ago. The other two fish do not have a bump. It’s kinda hard to tell since I can’t get a good picture but I’ll take any advice. I took several pics with bedroom lights on and off in case it makes a difference. Thank you!

 

[Guyb93]

I’m not sure as to what it is , it almost looks natural in a way
I’d start with a small to medium mater change I’d avoid a large one as the water is a month old and even changing the water for the better can cause a shock if too drastic of a change
But yeah I’d give the tank a good clean and gravel vac

 

[Freshyfishy]

it almost looks like pink gravel... I would say catch it and look, but that might stress poor fishy out so I would go to @Guyb93 idea first.

 

[Slaphppy7]

No clue what that is, but if the fish is acting fine and eating well, I wouldn't stress over it too much

 

[Jkhall]

I’m not sure as to what it is , it almost looks natural in a way
I’d start with a small to medium mater change I’d avoid a large one as the water is a month old and even changing the water for the better can cause a shock if too drastic of a change
But yeah I’d give the tank a good clean and gravel vac

Yeah it looks natural to me also but I’ve just never paid enough attention to it. I’ll give it a little water change and see what happens. Thank you for the feedback!