ID please

[AdamPL]

Can you help me identify what this is, and how can I get rid of this from my tank? It is a quarter of an inch big and it has spread on the live rock. I know it is not Majano.
thanks

 

[Hawkeye]

hate to jump to conclusions but it looks like aiptasia to me.

 

[AdamPL]

But it doesn't grow that big like aiptasia usually does.

 

[JohnS_323]

It's very hard to make out what you're pointing to in the pics. Can you get a clearer pic of it, or maybe crop this pic down?

 

[AdamPL]

OK I took better pictures

 

[Phyl]

Much better picture. Looks like a matless red star polyp or some sort of xenia. Where did the rock come from? How long have you had it? How long has it been growing there?

 

[AdamPL]

All of my live rock has been in the tank since 2003. At first, I didn't notice it as much because there wasn't much of it on the rocks. In the last year, though, it's been growing faster and is spreading more. It's become a bigger problem.

 

[NJ_ychung1]

def some sort of star polyp as you can now see it's 8 points on a polyp. aiptasia would be many more than 8 points stars. you can also see the polyp stem coming out of the mat.

 

[REEFLECTIONS]

also kinda looks like some sort of miniature anthelia.... or like the other poster said a xenia... looks troublesome to me, not sure how you would go about a full erradication, no telling how far it may have already spread...