What is this growing in my reef tank

[kcy]

Do you know what this is and how to get rid of it,
It's not Aptasia..

 

[Reefing102]

Looks like majano anemones. Predator wise it looks like certain filefish will eat them (but many files are also only reef safe with caution due to eating desirable things). Otherwise the consensus seems to be kalk paste or Aiptasia X injections.

Some others say peppermint shrimp and butterflies work but that’s seems mixed.

Others say to bleach the rocks and start new but I see you have what appear to be established corals so that can be a bad path to go down.

 

[griss]

I agree, Majanos. I battled them a long time ago. Peppermint shrimp didn't touch them. A Raccoon Butterfly, on the other hand, decimated them. But, once the Majanos were gone, it started picking on corals and clams.

 

[kcy]

I tried several file fish but none of them touched it, I have a copper band in there and it not touching it either, I see if I can find a Raccoon butterfly..
This thing spreads so quickly.