What do we have here?

[musgrave314]

Was doing a partial water change today and noticed this on a rock. Probably the size of a dime. Any ideas what it is? Thanks for any help.

 

[Salty.Reefer]

Looks like a ball anemone to me. Beautiful little hitchhiker. Also harmless. I have many in my tank.

 

[erinmegan85]

+1 on the ball anemone. I have some in my tank too!

 

[Bdog4u2]

You probably have quite a few more lurking around a blue flashlight at night will show you where they are.
They're a pain to get rid of also

 

[musgrave314]

You probably have quite a few more lurking around a blue flashlight at night will show you where they are.
They're a pain to get rid of also

At what point would you start to attempt to get rid of them? I've had the usual small white starfish hitchhikers and slug things that have been fairly easy to remove. I am sure these would be more along the lines of aptasia when trying to remove. I've heard others say they are harmless and I would agree at this point as I only see this one spot currently.

 

[NanaReefer]

I've had them for 7yrs. Have never caused an issue. Even have one on a tiny Zoa rock and they don't mind at all. [emoji2]

 

[RJ Harris]

I've also got a few in my tank. Some growing next to zoas with no harm. There actually not nems at all there more closely related to richordea's