Caederus Americana
 Desert Caves 
Sapience level Non-sapient
Lifespan 9 months; can lay dormant for 300 years
Average length 30 ft. long, 6 ft. wide.
Diet Carnivore
Population status Critically endangered
Danger rating Extreme threat

More Tremors species

Graboids, also known as dirt dragons or Tu Lung are subterranean invertebrates originating from the Devonian period.


Graboids bear a superficial resemblence to gigantic worms or snakes. As a species they seem to prefer hot, arid locations such the desert of the American south west. Their eggs can lay dormant for up to 300 years, only hatching once exposed to a heat source. The hatchlings, although small, are carnivorous and will begin hunting soon after birth. Hatchlings hunt in packs, shooting up from the ground, grabbing their prey, and dragging it back underground, vibrating as a means to shift the soil. The creatures will reach full size in about 3 months; a mature graboid can weigh 10-20 tons. Graboids hunt via sound, able to track something as small as a cd player across the surface.

Mature graboids have a slightly different hunting strategy. Once they have pinpointed the source of a noise, they burst from the ground and ensnare their prey with a trio of prehentsile tentacles located within the beak. The tentacles themselves have toothed maws and a pair of horns; they can also reach up to 10 feet. Once ensnared, the prey is pulled underground and digested. Since they are so massive, fully grown graboids can no longer vibrate to move soil out of their way; instead they simply use spines along the body to move beneath the surface.

Graboids themselves are only one of three stages in the lifecycle of the creatures. Eventually, fully grown individuals will give birth to three Shriekers, dying in the process.