Anemone? Worm? Duster?

[Rueda13]

This thing hitch hiked on my live rock a month ago and now seems to be getting bigger. What is it? Remove it or beneficial? sorry for the picture quality

 

[buddhafish]

Looks like aiptasia

 

[ericarenee]

aiptasia....

NOT A KEEPER

 

[Ron Reefman]

The last pic makes it clear enough to be sure. It aiptasia, get rid of it asap.

 

[Rueda13]

Thank you for your replys

I'm going to get a peppermint shrimp. I hear if you pull them out they can multiply

 

[mcgyvr]

Thank you for your replys

I'm going to get a peppermint shrimp.

Good choice..

And bookmark this for future reference..
http://www.lionfishlair.com/hitchhikers-guide/