What is this thing?

[novajoe]

Anybody know what this is. Im not sure when it showed up but it's been there at least a week now. It's a bunch of tentacles and white spheres on top of them. Dosent move.

 

[Fish Styx]

It's hard to tell from the pictures, but it could be a ball anemone.

 

[Brit’s Fish]

Ball anemone - they usually like to hang in the shadows in my tanks. I have heard they can get out of hand but I have not personally ever had an issue with them.