New find on rock, mushroom?

[DRTYshredCo]

Found this new thing growing on a rock and wondering if anyone can help ID what it is. It has a main body that is circular in shape, about 1/4” wide, maroon in color with white speckles, has an oblong mouth in the center like a dendro or paly, and has many clear tentacles with a white bulb on the end of each. Looks to be some sort of mushroom. Trying to ID to see if it’s a pest or freebie from live rock.

 

[MERKEY]

Glass anenome......harmless unlike aptasia and mojano.

 

[kichimark]

Agree with @MERKEY. Also known as ball anemones.

 

[DaneGer21]

Although not a mushroom, you are good to go like mentioned above!

 

[DRTYshredCo]

Ball Nem it is! Thank you all for the insight

 

[flsalty]

Ball anemones are corallimorphs, like mushrooms.

Glass anemones are aiptasia, not ball anemones.

 

[reef lover]

Correct corynactis