Any pros able to tell me what this is? I pulled it off of some egg crate in my QT that I have some Xena on... Looks tubeworm-ish, but doesn't retract or anything. What you see is what it is. Riddle me that, and I'll get an update posted on the display tank!
Edit: for size, that 6 is the bottom of a 6oz plastic cup. So, it's pretty small.