Cthulhu Larva
This one is not only scary but can also turn your stomach inside out. It is the larva of the Deep Sea Holothurian and is found mainly in the Demerara Abyssal Plain. It also has habitats in other major bodies of water except the North Atlantic Ocean. With its number duplicating in large numbers, this will not be on the protected or endangered list for a long time. The larva is faceless and has mud on its main menu.