What is this?

[Munjy]

Got this fine chalice for cheapo dollars. What kind of worm is this. Hard shelled with soft mouth. Peanut worm?
I'm guessing it's not a predatory worm and more of a filter feeder, if it's a worm at all. Thanks friends.

 

[Goaway]

I might be off, but looks like a tunicate

 

[ISpeakForTheSeas]

Looks like a solitary tunicate species to me too.

Edit: to add, tunicates are harmless filter feeders.

 

[IKD]

Got this fine chalice for cheapo dollars. What kind of worm is this. Hard shelled with soft mouth. Peanut worm?
I'm guessing it's not a predatory worm and more of a filter feeder, if it's a worm at all. Thanks friends.

Is that a chalice or encrusting Monti?

 

[Munjy]

It could be a monti. Its about 3 inches in diameter.