It's a worm alright but not a spaghetti worm. This worm can burrow a hole or make his own similar to a coco worm but not as massive and without the beautiful feathery head. I have one, I'll try for a pic of my mystery worm tomorrow.
Spagherri worms, also known as Medusa worms, burrow in
DSBs but not in rock. Here's a pic of mine....
Great for
DSBs.