Same problem again

[Orlando-Jeff]

I posted a couple of weeks ago showing these string like things on my zoas. I blew them off and it seemed like the zoas came back good as new. But now, they seem to be coming back stronger than ever. Does anyone know what these are and why they seem to be all over my tank. They don't seem to bother any of the other corals but they are on all the rocks.

 

[frisbee]

If they don't seem to be bothering anything then they're probably just sponges of some sort. These do come in all kinds of shapes, sizes, colors and forms.

 

[Squatch XXL]

are they some sort of tube feeder?