Need ID if you can

[Dub]

These have been in my tank for 6 months
And starter with 4 polls. Thanks

 

[Auquanut]

Mojanos maybe?

 

[Phycodurus]

mojano/manjano anemones. you can use a syringe with boiling water to kill them off, or smother them in kalk paste.

as an experiment, i isolated some mojano-infested live rock in a 10-gallon QT, and introduced a chocolate chip starfish. no more mojanos after several weeks!