Are these worm trails?

[JediCruz]

So after I put in a small piece of live rock from my LFS, I noticed these trails on the rock and now on the black glass. I assume these are trails of some type of worm?

 

[duberii]

probably something like a spionid worm- lots of worms build tubes like that- check for 2 clearish white tentacles coming out of an opening of the tube.

 

[JediCruz]

probably something like a spionid worm- lots of worms build tubes like that- check for 2 clearish white tentacles coming out of an opening of the tube.

So it’s just a trail of sand that I see, not a tube, if that helps

 

[duberii]

So it’s just a trail of sand that I see, not a tube, if that helps

Are you sure? The tubes can be pretty narrow. I have no idea what it could be if those aren't tubes

 

[JGT]

Spionid. They make tubes out of sand, gravel, held together with mucous. Detritus feeders.

 

[JediCruz]

Ah. Thanks @duberii and @JGT ! Very cool.