Venom

What transpires when a large number of tubifex worms enter the sewer has already been witnessed. Nevertheless, a man in the Caribbean found what, in all actuality, seemed to be the Venom symbiote. A pullable, glassy, black mass of writing gunk that appears to put itself back together after being broken apart. Some speculate that tubifex worms were at work once more, but that was not the case. Fortunately, it wasn't an alien symbiote that was prepared to devour human heads.

The incorrect assumption was tubifex worms, but it wasn't too far off. The mass that resembled something from a Marvel Comics was actually a bootlace worm, according to the video. Think vermicelli noodle size while imagining bootlace worms. They are lengthy, though. They form writhing, twisting odd bundles as they group together in bunches.

180 feet in length was the record for the longest bootlace worm, which is horrifying in a whole different sense. A highly poisonous mucous is also produced by them. Hence, even if this isn't strictly a monster, you should still avoid encountering it.