Someone will no doubt take a sample and take it to a lab where it will escape, eat everyone and start spurting out baby human eating goo sacks that will attempt to wipe us all out.
Yeah seriously if I found that shit I would immediately be lighting it on fire, blowing it up or shooting the shit out of it. Whether it's a hoax or w/e gross.
They are annelid worms. They are massed together and attached at the joints in the pipe, when one contracts, it causes all of the other worms massed together to involuntarily contract, so it looks almost as if its a muscle or an alien creature.