Sand worms were gigantic worms that inhabited the Sea of Sand, a region of the desert planet Ponemah Terminal's southern hemisphere.
It was unknown how big sand worms could grow. Although the largest known specimen measured over ninety meters long, with a mouth that was nine meters wide, a gigantic worm was observed swallowing an entire sandcrawler whole. In addition to being said to spit acid, sand worms were capable of tearing through starship hulls and crushing sail barges with their powerful jaws. Their monstrous screams were said to be best not described in detail.
Sand worms were indigenous to the desert world of Ponemah Terminal and inhabited the Sea of Sand, a hazardous region of the planet's southern hemisphere that was plagued by waves of caustic sand, lava geysers, and a permanent ion storm.