Graboids are the main antagonistic species in the Tremors series of films and the show, also known as the Dirt Dragon or Tu Lung in the 19th century, is a fictional invertebrate species that is the primary antagonist of the Tremors franchise. The creature made its debut in the 1990 film Tremors, and reappeared in all its sequels Tremors 2: Aftershocks (1996), Tremors 3: Back to Perfection (2001), and prequel Tremors 4: The Legend Begins (2004). It was also featured regularly in the series' spin-off Tremors: The Series (2003), with El Blanco being a recurring character. A variant was featured in the 2015 film Tremors 5: Bloodlines.

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