Any idea what sort of fossil this is?

[Marijo27]

At first I thought it was a crinoid fossil, or "indian money" as most people call it here in Tennessee, but after looking into it a little I'm having trouble finding any matches. Any idea's? Any feedback is appreciated!!

 

[Geoclean]

At first I thought it was a crinoid fossil, or "indian money" as most people call it here in Tennessee, but after looking into it a little I'm having trouble finding any matches. Any idea's? Any feedback is appreciated!!View attachment 1552549

In the ocean there was a living tube worm that actually rooted in the floor of the ocean. It would boar through the mud. I have a few rocks like that as well.