help with anemone ID

[Lrood]

I have had a few of these little anemones multiplying in my tank (slowly) for about 6 months. I think the first one came in on the bottom of a leather. There are 6 at last count. Any idea what they are? Harmful or problematic? They are at most about 1/2 inch across when fully expanded. I have 2 peppermint shrimp that ignore them. Thanks for any help.

 

[Amphiprion]

Looks like one of the several species included in Anemonia cf. 'majano.' A nuisance anemone, really.

 

[ficklefins]

Tulip anemone.

 

[illcssd]

Majano anemone. Bad pest anemone...Try joes juice to remove them. Other wise they will sting things and just keep spreading.

 

[Lrood]

Thanks all... their days are numbered!