Graboids

''"That's how they get you. They're under the goddamn ground."

- Valentine McKee ''

Graboids are the main antagonistic species in the Tremors series of films and the show.

Appearance
Graboids are giant predatory worm-like beings. They have no eyes and seem to grow through metamorphosis in the same way butterflies do. They live a larval underground existence, and rely on the sense of earth vibrations to hunt their prey. They also have a beak and many tongues with mouths on them. The worm-like graboids give birth to shriekers which come out of the mother's stomach, killing her. Shriekers have two legs and heat sensors, they give birth by rejecting an egg from their mouth. Shriekers then become ass-blasters which have wings and fly by ejecting fire from the anal cavity. It is believed that graboids are mollusks that originated in the Devonian (some sources even say Praecambrian) period, before the age of dinosaurs. The graboids prey on humans and animals, rising up from the ground to capture them.