Help identifying this small... coral?... anemone?...

[Bananarama]

Hello, this is my first thread on RC.

I purchased a discosoma frag this week, and there were a few pest anemones and two unidentified... things... I cannot tell if it is a type of pest anemone or a type of soft coral. I can tell you it is definitely sessile (it has moved an inch or so), and has a base like a small aiptasia. The main difference is that it's tentacles/polyps are dendritic rather than smooth like an aiptasia/majano. I am still new to the reef hobby, so I don't have a lot of guesses of what it could be. The guy at my lfs was also unsure of its identity. The only guess I currently have is that it is a tiny nephthea. I attached the best picture I could take of it.
Thanks!

 

[AlSimmons]

Some sort of Xenia? (first thought)

 

[Bananarama]

I found another blog with someone trying to identify something very similar:
https://www.reddit.com/r/ReefTank/comments/755bzv/id_small_hitchhiker_anemone/

They seem to think it may be a hellfire anemone. Any opinions on that? Mine does have a mouth, and it retracts when disturbed.

If it is a hellfire, is that something that should be removed asap?

 

[AlSimmons]

After comparing what you have to some pictures of a Hellfire anemone online I think they may be right. Whether or not you should remove it I don't know. Definitely keep your eye on it though.

https://www.google.com/search?q=hel...sAQINg&biw=1024&bih=542#imgrc=3-YfFN1E5mn63M: