The Bat Eating Worm
These big guys hang from the roof of caves and use their large feelers to catch prey. They have feelers equipped with luminescence and sticky mucus that help snare their prey. Once caught, the large pincers draw the bat or other creature into its mouth. They can grow large enough that the hanging portion can be as long as a man's forearm. You don't want to know how long they are when you figure out their total length, including their rock anchoring tail.