Are These Worms?

So today I was siphoning out some stuff, I somehow have a little bit of diatoms back on the surface in a few spots.
As I was sucking up the sand, I saw all these little blackish thing sticking up.
They weren't really moving or anything, but they looked a little bit tree twigs or something.

There were what were under about a centimeter of sand.


And these were in the front of the tank, that I've seen for about a few weeks.
They appear to never move, dead?


THANKS

 

I believe there are worms that form in a deep enough sand substrate. If that's the case they are harmless and will help to keep your sand sifted

 

Thanks for replying.
I assumed they were worms, but none of them were really moving.

Is 3 inches or so "Deep"?

 

While some may argue that you need more or less, the basic rule of thumb for a DSB is 3 or more inches.

 

I have tons of these pressed up against my glass. If I blow the sand around, I can see their heads sticking out just like yours. I spent hours trying to find out what type of worm these are specifically... they're really ugly to look at. Was hoping some type of fish might like to eat these?

 

Tubeworms from the Oweniidae Family don't move (because they live in a tube).