A monster? An alien? Nope, this is a macroscopic image of a Polychaete, or bristle worm. They can survive intense sea pressures and some live around deep sea vents, miles below the surface. Life can live in the most peculiar places.
Polychaete Worm - Don't let the rainbow glow fool you. This polychaete worm-found feet meters) down on the muddy seafloor off northern New Zealand—is a ferocious predator, with jaws that project à la the Alien movie monster.