Need help identifying a stranger in my frag tank

[MThomson314]

Good evening all,

I happened upon a critter in the sand bed of my frag tank (Tupperware bed for the six line).
Having just recently fragged some zoas, I had assumed that one came detached from the plug and needed reglueing. So I glued it on and went about my night. When I went back to the tank a few hours later I had noticed that the critter had moved off the plug. Upon further observation I noticed it had adhered to the side of the plug via a foot and had a slime coat.

This tank is relatively new and houses my zoas taken from my display tank and no new corals have been added in a long time. Any help identifying this guy would be great. He’s currently caged in a specimen cup until he can be identified.

 

[KJ]

Look like Majano anemone.

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[reeferkeeperabq]

I would say majano anem as well, very invasive and not good. It's honestly the prettiest I've seen, but your good to toss it. They are always confused with RFA's. However, your missing the "skirt". Good luck!