little black snails

[kbauer]

I brought home a little branch and rock thing from the water in the Keys that I thought would look good in my reef tank. I didn't notice anything on it particularly, but now, 2 weeks later, I have noticed these tiny black snails on my glass. So far I only see about 5 or 6, but they are beginning to worry me as I have never seen any snails like that before in my tank. Anyone have a clue as to whether I should plunk these out immediately or hope they thrive Thanks for the help.

 

[Minotaur15]

if they aren't pestering anything, just leave em and watch what happens. can you get a pic?