Anyone can ID this?

[Oldsalt]

I did the maintenance thing today then was admiring looking through pristine glass to find this ball with white dots protruding from it rolling around the sand. When it stopped, I could see the tentacles that hold the small white dots moving. I got the vacuum ready after taking these photos. By the time I went to syphon it out, it was gone. Maybe under a rock. Maybe got eaten. The blurry photo is with full zoom so you can't use that to gauge size. The next photo is normal zoom. Diameter is about 1/2". It seems to have almost neutral bouyancy when off the substrate but tends to settle to bottom then roll around in the currents.

 

[Lovemyreef2015]

Sounds like a ball anemone

 

[Dsnakes]

Sounds like a ball anemone

Beat me to it

 

[Oldsalt]

Thanks guys. Lights are out. I'm in Perth and 12 hours ahead of EST in the USA so my day is ending. Going to suck it out tomorrow. I'll find it. Chromis were picking at it - it's how I 1st noticed it. I found one tiny Manjano and an Aiptasia sprouting from an easily removable rock so I nuked them then covered with super glue. Now this .. Not sure ball anemones are a problem but I'd rather it be gone b4 getting sucked into overflow. Cheers