Is this a pest or not

[jtaylor1101]

I broke a piece of a montipora frag yesterday and found these little black hard worm looking things inside. Looking around the tank I noticed them on other corals. Are they pests or are they part of the coral. Or better yet something good for a change, been on a bad run! Please help.

 

[jtaylor1101]

Here is another pic

 

[lifeoffaith]

Looks like vermatid snails to me. They can be pests, but I have a few in my tank that haven't really multiplied, so I don't worry too much about them. I have broken some of their shells, and those seem to die off rather than "regrow" their shells.

 

[jtaylor1101]

I think your right. Thanks. Any idea on what the white tubes are on this. Some of its super glue but not all of it.