Help me to ID this please

[Eyomael]

I have 3 in my tank. I don’t know where they came from

 

[BryanM]

aptasia

 

[Eyomael]

aptasia

Is this ok or should i remove them?

 

[BryanM]

Is this ok or should i remove them?

Most people hate them, and they are notoriously difficult to get rid of 100%. PLenty of information to search for around here, but if you only have 3, I'd think you'd be fine with Aptasia-x, F-aptasia, Joes juice, etc.

 

[Tahoe61]

Could be a Majano as well, yet another pest anemone