Pest anemone?

[Logan Powers]

I noticed these anemones in my tank. Was wondering if they are harmful to anything. They come out at night and have tiny green dots under the blue lights. This is a brand new tank but I’ve had the rocks cycling in a bucket for quite a while. There are 5 or 6 of them around the tank, should I kill these things or let them be?

 

[Wen]

I noticed these anemones in my tank. Was wondering if they are harmful to anything. They come out at night and have tiny green dots under the blue lights. This is a brand new tank but I’ve had the rocks cycling in a bucket for quite a while. There are 5 or 6 of them around the tank, should I kill these things or let them be?

Looks like ball nems, I’d leave them.

 

[TnFishwater98]

Looks like ball nems, I’d leave them.

Ball anemone, if you can get them out I would.