Baby Turbo Snails? - I only have one adult

[SonRK]

http://imgur.com/a/FJPUy

 

So I see several of these little guys around my tank now. They're definitely snails since they have that characteristic mouth, and you can see their antennas come out if you stare at them long enough. I was actually highly entertained by them for an hour! Just finding them scattered around my tank and such.

 

But then I got to thinking. I only have one Turbo snail in my tank. Did he just spawn by himself? Or are these all different kinds of snails

[Mariaface]

Limpets!! So cute! Usually just harmless algae grazers.