Any ideas what this can be?

[Cyclo]

Ok This little pink/beige thing started growing out of my live rocks. When I touch it, it will retract back into the hole it came from.

 

Last week I moved a ricordia close to it, and it has grown since and today they bumped into each other. The pink think sucked in one of the ricordia's bubbles and now the bubble is all black and melting.

 

I don't have a picture right now because its covered by that peice of ricordia still. Its really small (like smaller then a ricordia bubble).

 

Any ideas?

[splifmeister]

Is it like a little tube? If so, I just noticed some growing on my fiji I picked up a month ago - it looks somewhat like a little worm shell, and now I've noticed a few empty ones (hollow shells?) that were on an area previously covered with rock. I would be curious if anyone knows what this is.

[Shiva]

could be maybe aptasia? i got a couple of pepermint shrimp to take care of my aptasia problem. just a guess though with out a pic its hard to say