help ID

[leanolife]

I have a cultured live rock that is growing feather dusters like crazy, but it also has this red prong type thing that also pops in and out of the rock. It looks like one of those head masagers but red. Anyone know what it chould be?

 

[leanolife]

Maybe not red its brown ish and the I guess tentacles move.

 

[meowzer]

look up aptasia or majano anemone
they are pests and you do not want them

 

[btldreef]

Sounds like majano to me as well.
Take a look here: http://www.lionfishlair.com/hitchhiker/hitchhiker.shtml This site is filled with great pictures and info on almost any hitchhiker that you might come across in your tank.