Got a new one. Any idea what it is other than a 'worm' by the description.
It was ~7" long, intact and "gallstone green" in color. It looked like a tiny piece of rope at first.
Not really possible to photograph - it broke into 4 pieces when I tried to remove the last of gallstone green BM around it with a skewer. It is only as thick as maybe 4 strands of hair combined.
P&B shakes are getting this out.
This makes the 3rd unidentifiable critter I've seen in the last 2 weeks.