Is this aptasia?

[Markclaster]

Because, well crap if it is

 

[york1]

Looks like it

 

[ActiveAngel]

Yes it is.

At least 2 of them.

 

[Markclaster]

Super. Can I just suck them up out of the sand? Or do I need to treat with something?

 

[kullas]

Good thi g is there in the sand just gently remove them along with the pinch of sand

 

[ActiveAngel]

Yes, but that won’t be a guarantee to be rid of them. These things are super resilient, and release their seedlings to spread all over the tank very readily

 

[FutureInterest]

Try sucking them out with a siphon into a bucket. If there are two that you see, there are a bunch more you don't...