Of producing snails from nothingness. I see in my main tank today I have baby MTS. Bear in mind I have added nothing but food & water to the tank in about 3 months and have never had snails before. I'm not compaining though, they will probably do my plants some good. I'm pretty sure they are MTS, unless there is another snail with that kind of spiked horn, it is hard to tell cause they are young.