What is this in zoanthid colony??
 

http://pictures.sprintpcs.com/mmps/0...itsize=615,500
is it possible that an aptasia can put itself inside of a zoanthid?? i had aiptasia around my zoanthids so i used aiptasia-x to get rid of them and i got a shrimp to help the problem...and it seems like they had gone away but there is this little thing in the middle of my zoa colony that looks like it is inside one of the polyps that sucks in this white string with what looks like a little mouth.....i picked up the coral that my zoas (and the little unknown thing) were on to take a picture to ask if some one could identify it and it released little brown pellets....does anybody have any idea what that is????? it is in the middle of the zoas that are closed up

I can't see your picture, but I saw your post in the other thread and responded. They will grab and eat what floats by close enough. If you don't like it, see if you can pull it out of his mouth.