Assuming this is aiptasia?

[biodarwin]

 

[AdeptMrSniffles]

Looks like it good sir. Joes Juice will take care of that fella.

 

[Bifferwine]

You got it.

 

[dcantucson]

Aiptasia-X works well too.

 

[Ted]

Aiptasia control works well also just used it this weekend.

 

[yote]

Thats what it is.
All the above methods will take care of it.

 

[Hornet]

I had aiptasia scattered throughout my tank, instead of treating all the aiptasias scattered throughout the tank I bought some peppermint shrimp and they devoured them.

 

[biodarwin]

Thanks for the suggestions. I am going to a bit more research and buy something to kill it. I definitely do not what a tank full of those.