Graboids are fictional creatures from the movie series Tremors. They are large, underground-dwelling monsters that sense vibrations in the ground to locate their prey. Graboids have long, snake-like bodies and multiple tentacle-like appendages that they use to capture animals and humans. These creatures are known for their distinctive, worm-like appearance and their ability to burrow quickly through the earth. Graboids are a significant threat to the residents of the fictional town of Perfection, Nevada, where the films take place, leading to various survival challenges for the characters involved.