These guys popped up a couple weeks ago. They almost look like baby snails, but they hang out above the water line. I have some astrea and certiths. This doesn't look like either of those. Super tiny maybe like have a pinky nail and I have probably 5 or so in the sump area and I put this guy in the display to see what he would do and he climbed out of the water. Any thoughts would be greatly appreciated.