New worm in tube ID help please

[carri10]

Hello. As my tank continues to mature, a few new critters show their face from time to time.
This time, I have about 5 of these growing on some rock.
I’ve circled the worm.
First picture is the ‘mouth’, secondly me is what the tube looks like.

Anyone have any ideas?
Thanks.

 

[NonstopSoda]

Looks like either a feather duster without its crown or a vermintid worm.

 

[Gumbies R Us]

I'm going to say it looks like a vermetid

 

[carri10]

Thanks both. Are you sure on the vermatid? I’ve had about 10 so far that I’ve snapped/smashed. They were much thinner, more purple and sticking out away from the surface. These are incrusted onto the surface, white-ish and thicker.
Are they many types of vermatid?

I’ve got a tuxedo urchin that patrols that rock.

 

[NonstopSoda]

Thanks both. Are you sure on the vermatid? I’ve had about 10 so far that I’ve snapped/smashed. They were much thinner, more purple and sticking out away from the surface. These are incrusted onto the surface, white-ish and thicker.
Are they many types of vermatid?

I’ve got a tuxedo urchin that patrols that rock.

They come in all different colors, in my tank i have white,brown,lightbrown, and black shells on my vermintids. even if you think you got them all its very likely they've already spored and made more.

 

[carri10]

Got it. Thanks. These are significantly different from the others, definitely not the same species, so I’ll assume I’ve at least two species in my tank.