Volcano Snail??

Just a quick question. I recently noticed what looked like half of a clam on the front glass of my tank. Upon closer look I was able to tell that it was a snail of some sort. I went to the lfs...I know, I know...not the best idea...and I was able to see some of the same types of snails in their tanks. I asked someone what they were and I was told that they were "Volcano Snails". I was then told that they were harmless and I shouldn't worry. These snails are extremely small...about the size of a wooden matchstick head and I have only found 1 in my tank. I would attempt to get a pic of it, but it is so small and my camera isn't the best so I am not going to try. My question is, was I told right about this "snail" being harmless or not? I just want to make sure everything is ok in my tank.

Thanks,
Bradd

I wish I could tell you what color it was and the type or shape of the shell. It is really pretty small, so as for the color I really couldn't tell you. The shape of the shell from what I can tell so far...it looks like half of a clam. Other than that I can't tell too much due to it being so small.

Thank you...makes me feel a little better.

yeah, but the snail is so small (about the size of a wooden matchstick head) not sure it would do any good. I can try to get a picture of it if you want. Just let me know.

Ya lost me there...lol. I will try to snap a pic of it...not sure how well it will turn out though.