Hey guys I think I have some snail spawning in my aquarium. Earlier today I saw the guy in the photo (looks like a young cerith snail) emitting small yellow particles into the water. He basically stood up and started contracting and it was all over in a few brief moments. At first I thought it was some type of sea squirt until I took the piece of rock out. Does this sound right to you guys?
I think this sums it up http://www.wetwebmedia.com/snailreprofaq2.htm It is in this section Hitchhicker snail reproduction: Stomatella Vaia - 1/17/08