Congrats! A foot long, that's amazing! I know exactly what you mean... It's like a mesh of seaweeds? I emit those pretty frequently on a regular basis, along with dried up dates, rubber tiles, asian noodles, chains of balls, all sorts of weird funky stuff, you name it. It really amazed me how much junk is inside my little body. And, I don't even have a belly (when not bloated, when I'm bloated that's another story).
What kind of plaque are you working on? Artery, tooth plaque, mucloid plaque?