The white "little floating dudes" are from Moyashimon. They're mainly L. Acidophilus and what appears to be S. Lactis (though it looks like there are a couple of some other ones in there too..not sure which they are at the moment.) They're both common bacteria in fermented stuff, especially dairy-related.
I can't help but think there's a pun/joke here that I'm just not getting, though.
