White-ish anemone

[Bobblehead]

Noticed a couple of these white anemone looking things in my tank a month or so ago. They haven’t multiplied in that time so I’m guessing they’re not aiptasia, so ok to keep? They only pop out at nighttime.

 

[Coralsdaily]

little feather dusters, harmless

 

[Bobblehead]

Thank you