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!!

 

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[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.