What is this spiky spiraling growth?

[LunarCubes]

I need help identifying this almost spiky spiraling growth on my live rock. Thanks..

 

[rrasco]

I don't see it, but my guess is vermatid snail.

 

[cloak]

It looks like some sort of macro algae. Caulerpa serrulata would be my guess.

 

[LunarCubes]

It looks like some sort of macro algae. Caulerpa serrulata would be my guess.

Thanks! After googling that its a positive ID. Just finished removing the infected rock from my tank. What a pain in the @ss but worth the trouble now, rather than dealing with the possible consequences later down the road...