I think I found the mystery critter

[EvilTwin]

I've been using the trap for the last three nights with no success. This morning, while looking around the tank and showing it to someone I stumbled across what looks like some kind of worm. The hole is very small, and it was able to retract all the way in and disappear. When it was poking out it looked to have a black/white coloring and it was spreading out what looked like feathers at the end/head that poked out. It almost looked like some kind of feather duster but this is much different. I'm thinking some kind of bristleworm but I need to research some pics. I tried to get a picture but it's in a tough spot.