Help Identify???

[adonegan15]

This started growing about a week ago. It sort of looks like a mushroom to me but I am not sure. Anyone know what this might be?

 

[adonegan15]

 

[Tahoe61]

Does it close at night, can you see any skeletal structure?

 

[bios]

I Will Say a discosoma very Common one

 

[adonegan15]

Does it close at night, can you see any skeletal structure?

It does close at night. I don't see any skeletal structure. It comes out from under the rock during the day. It seems to be growing larger.

 

[tacoshell]

Looks like a red mushroom [emoji265]

 

[tacoshell]

I have lots in my tank