Sewer Monster

Back in 2009, a popular video went viral and sent shivers down everyone's spine. The image in the video is most accurately characterized as a writhing nightmare attached to a sewage wall. Many immediately dismissed it as a scam or a form of viral marketing for a horror film. The reality was that it wasn't one of these things.

The spooky, pulsing mass was an actual phenomenon that made people think of the film Aliens and possibly The Thing. It turned out to be a colony of tubifex worms, not any other unearthly explanation. Living at the bottom of ponds and in sewage are tubifex worms. Perhaps as a result of the intensely hot and bright light they are exposed to, they writhe and pulse in front of the camera. You won't likely find them just by lifting a sewer hole and sticking your head inside because they're also relatively uncommon.

The worms resemble other worms when they are by themselves. Yet, they create gigantic quantities in colonies. When enough of these congregate, it resembles an internal organ that has lost its skin—it is squishy and vibrates. Not a super monster, but certainly unpleasant.