Is this a pest or a tiny polyp form a coral?

[Mary Carmen]

Please help me ID this pink polyp looking thing. It closes really fast if something goes by fast.
It came attached to a rock when I bought some mushrooms.
I have a 29g biocube with soft corals.

Thank you,

 

[SaltySam09]

Is the whole pink section attached to it? or is just coralline and something has imbedded or grown over it?

 

[Mary Carmen]

it looks like a ball attached to the rock with a polyp.

 

[Mary Carmen]

the polyp like head goes inside the pink ball if something comes close to it.

 

[Rtaylor]

I don’t know if you are going to be able to get an id without a better pic. It’s really blurry

 

[CWoods]

kinda looks like a mini feather duster within a round sponge

 

[Mary Carmen]

Let me see if I can hold the rock and take a better picture.

 

[Mary Carmen]

It is so small! Very hard to see. Here are some pictures.

 

[Mary Carmen]

It looks like it has two heads?? Maybe is a Gsp!?

 

[Mary Carmen]

but white tips?

 

[SaltySam09]

Pretty sure it’s some type of pink sponge, not sure about the polyp. Maybe some form of anemone?

 

[SaltySam09]

Check out ball anemone, that might be it.

 

[a.t.t.r]

Tunicate maybe. Can’t see it clear enough.

 

[Firepony]

Looks like my mystery coral but smaller and redder, mine is more brown. Right at the end of my video you can see it best. I still have no clue what it is
It's right about the Coraline patch and to the right of the white mushroom . Neat little guy tho. It seems to "sway" on its own Accord, but mostly stays still. Has not moved in weeks.