Graboids, also known as “Dirt Dragons”, are a species of predatory creatures sighted in North America.

Graboids are subterranean, invertebrate animals, superficially resembling gigantic worms or grubs, with long, serpentine bodies. When fully grown, a mature graboid will measure up to 30 feet (9.1 m) long, and 6 feet (2 m) across at their widest point and weigh 10-20 tons (22,000-44,000 lb). Graboids completely lack eyes; they don't need them, due to living underground. Instead, they sense vibrations. Their heads consist of a massive, black, armored beak, which is used to push aside the dirt whilst digging- there is a wide upper jaw, a thinner lower jaw, and a pair of hooked mandibles on either side.

Graboids have a trio of long, powerful, serpent-like tentacles, which are prehensile and have a reach of at least ten feet. Normally kept retracted in the graboid's throat, these tentacles were initially mistaken for the actual creatures, causing a group of humans underestimate their underground opponents. The graboid's common name is derived from these prehensile tentacles, which “grab” prey and pull it back down the graboid's hungry gulle