Need help figure out what this is!

[McKenna]

Hello

I am new to coral tanks. I have had a saltwater fish tank before. But I have a 29 Bio cube and noticed this starting to grow in my live rock there are 4 different ones like this. Can someone tell me what it is?

Thanks

 

[salt_for_brains]

Looks like mojano anemone to me. They are a pest anemone.

 

[fastrd400]

Majano. Pest anemone on steroids. Kill it any way you can. They spread quickly and have no known predators to my knowledge.

 

[ReeferRob]

Not even Raccoon or pelewensis butterflies will eat the damn things. I used a syringe filled with RO to obliterate mine