Mushroom Or Anemone?

[Danno]

Today I headed over to my local fish depot and picked up large coral. and didn't know that there was something on it. I don't know if it is some kind of odd mushroom or anemone. If it's an anemone i'm going to pluck it off the rock. The last thing I need right now is nuke #2. Here is a picture:

 

[Lynden]

Not a mushroom. But it could be a coral of some kind. Try touching it; if it forms into a "gumdrop" or clearly lacks a skeletal base, it's a nem. However, it doesn't exactly look to be in the position to declare war, being bleached.

 

[SkiFletch]

Agreed. Looks like it falls under the general category of Corallimorph anemone.

 

[Colin_T]

I think it looks like a bubbletip anemone (Entacmaea quadricolor). If it hasn't killed any of thexenia coral near it then I would just leave it be. If you try removing it you could kill it or it will wander the tank until it finds another secure home to settle into.