can you identify this?

[bigdaddydi]

I have some type of coral, or anemone that has grown out of one of my 6 month old live rocks. It is really only active at night; then it is fully stretched out, and moving around. During the day it kind of shrivels up, and only the tentacles can be seen. Here is a website were it can be viewed.
http://home.comcast.net/~stevemackie/unknown.htm
Stevemackie@netzero.com

 

[tuningvis]

to me it looks like a pest anemone
wait for others to reply with the same before taking it out.. but i'm pretty sure that thats what it is

 

[harial]

both are aptasia