What is that

[Saaqib_Ansari]

Seen a few of these in my tank never knew what they are ?

 

[Tahoe61]

Ball Tip Anemone. I think they are cool, some think the anemone can become invasive, I never had that issue.

Edit: I think.

Does it open and close like a fan/feather duster? Or more like an anemone.

If it has a skeleton than cup coral.

 

[ChgoGoodGirl]

Ball anemone (Pseudocorynactis I think) its a pest.

 

[Saaqib_Ansari]

Ball anemone (Pseudocorynactis I think) its a pest.

How do I get rid of it

 

[ChgoGoodGirl]

Its my understanding they can be pretty hard to get rid of. I hear Kalk paste works, sometimes. Im sure someone here can give some advice on these guys.

 

[Houstoner]

How do I get rid of it

Aiptasia x didn't work, and I failed at super glueing him into the rock. I ended up just breaking off the small corner of rock it was on.