Slipworms are one of these creatures. They resemble enormous worms, with an average length of 5 feet, an average diameter of just under 1 foot, and an average weight ranging between 130 and 175 pounds. These creatures are fleshy, possess no eyes or limbs, and move in much the same way as an annelid: through repeated compression and extension of their body, a phenomenon known as [https://en.wikipedia.org/wiki/Peristalsis peristalsis].
The slipworm's head is differentiated from the rest of the body by its rounded shape, capped by a cross-shaped section. This is the creature's mouth, which splits into four quarter-circular sections when fully opened. Each of these sections is armed with a large prominent fangcalled a ''worm tooth'', and several rows of teeth which line up deeper into the mouth and throat. Remarkably, the slipworm possesses no tongue or equivalent appendage, and appears to simply grind food down to a shape that can be more manageably swallowed.
Slipworms are omnivorous and practice lithophagy - swallowing rocks to aid digestion, like certain species of snakes. They have also been observed gnawing on wood, leaving distinctive tracks of bite marks across the objects they chew. It has been suggested that slipworms chew on wood to keep their teeth sharp.