Small Snail With A Shiny Golden Shell

[Bluejay]

Hey, I noticed a small snail in my tank today, I've seen one twice before in the month I've been fishless cycling my tank. As far as I can see theres only one, since I've seen him some rarely and he always seems a little bigger. Today I got a good look at the snail and it has a very shiny golden shell, can anyone tell me what sort of snail this is? And if theres any chance if its harmful?

 

[TylerFerretLord]

I would get it in a breeding box ASAP.

If it's hermaphroditic, you'll have a snail infestation soon. Just feed it in the box and get an ID by posting a picture.

 

[Bluejay]

Next time I see i'll try and seperate it.

Next time I see i'll try and seperate it. I'm hoping that since I've seen it so rarely that theres just one. It first turned up when my tank was bare so I thought I would have noticed it if more were around.