Neon Tetra Seems To Have A Growth

Hello. Does anyone know what this little growth is near one of my neon's anal fin?

Oops that was the same one....

I'm not exactly sure what I'm supposed to be looking at 

Where abouts is the growth, on it's back or side or underneath? The only thing I can see on top is the adipose fin (the tiny fin between the big dorsal fin and the tail in some species of tetra). These are usually colourless but in some fish they are white. My green neons are like that, just one has a white adipose fin, the others are clear.
If the growth is on the side or underneath, I can't make it out in the photos......



Females are fatter than males, and the stripe is often wiggly rather than straight. Over-eating is another cause. Or if the scales are sticking out like a pine cone, that's dropsy.

Ahh I can see it now 

It doesn't look very nice, does it. I don't know what it is I'm afraid.

I know that neon tetras get pointed lumps when they have neon tetra disease, but they get other symptoms too. Red area looks washed out; blue area goes yellowish; a black line develops round the tail; fish gets restless and leaves shoal; swims oddly.

Does the fish show any of those?

Keep a good eye on this fish. If it does turn out to have NTD, you'll need to euthanase it before it can pass the disease to the other neons because it is incurable. Your other fish would be OK as they don't catch it.
Hopefully, it won't be NTD.

Prolapses usually happen to livebearers rather than eggs layers, though I suppose it's possible to have a prolapsed bowel. It's not something I've come across before.
It a good sign that the affected one is back with the shoal.