One of our readers named Zaphod has explained to us about the Unknown Lifeform in North Carolina Sewer, thanks Zaphod.

He said that it is not an alien and not unknown, just rare. It is a colony of tubifex worms, coiled around each other, and covered with some slime ~ what looks like tentacles are individual worms. When one worm moves it causes the rest to move almost at once and thus you get the “pulsing”.

FYI, Tubifex are living food for the Pleurodeles waltl larvae and the fish. I have found a video of these tubifex worms in Youtube, I guess this is how it looks like without the slime, after the break.