- For information on the novel Sandworms of Dune, see Sandworms of Dune (novel).
The sandworm was a native life-form of the planet Arrakis. It lived in the vast deserts and sand dunes that stretched across the surface of the planet. Simply put, the sandworm was an essential factor in the creation of the Spice Melange.
Sandworms lived beneath the sand. Attracted to rhythmic vibrations on the surface, they would breach in pursuit of the origin of such vibrations. This was an effort to defend their territory, of which they were highly protective. Thus to see a worm, and live to tell about it, was extremely rare, save for the mysterious fremen, who had achieved a kind of mastery over the beast.
The Sandworm was the predominate lifeform on Arrakis, both honored and feared; vital and deadly.
By anyone's standards, Sandworms could grow to an enormous size. Dr. Yueh cited that specimens "up to 450 meters long" were spotted by observers in the deep desert. To make a comparison, the largest animal on earth was believed to be a Blue whale measuring in at only 33 meters, or about 12% of an average sandworm's length.
Many things commonly associated with Arrakis are surrounded in myth and mystery, and the sandworms are no exception. Some people believe that worms from 700 to even 1000 meters existed in the southern pole regions. This was neither confirmed nor denied. See Paul Atreides during his trial of the sandrider for further reading regarding their maximum observed size.
Due to the difficulty of studying these creatures, not much was originally known about the wild sandworms. The longevity of the sandworm was supposedly extreme, estimated in the thousands of years.
Their skin was thick, rough, and orange colored. It served the simple function of armor and was comprised of many scales, each a few feet in size. These scales overlapped and interlocked to form the armor that protected it against internal sand invasion.
As the Fremen discovered, this armor, while all but impenetrable, could be exploited. By prying open one or more of the scales, the integrity of the armor would be compromised; sand was now free to enter into the sandworms softer insides. This would cause intense irritation for the sandworm. The beast would then roll itself until the prone scale was at the highest point from the desert floor, thus minimizing the amount of sand that could enter.
A fremen poised to "ride" the beast as it rolled its open scale towards its highest point could literally mount the worm. As long as the scales remained open, the sandworm would not submerge. Maker hooks were then placed towards the front of the beast to control lateral movement. As a result, wormriding became a viable, even sacred, method of transport for the Fremen across the surface of the planet. Indeed, distances were even measured in "sandworms". A 20-worm ride would be a far, long and difficult journey.
A sandworm's internal workings resembled that of a massive blast furnace, producing intense heat and flames. This in turn provided the environmental link of supplying oxygen to the nearly plantless Arrakis. The mouth was positioned at the forward end of the creature and could easily consume gigantic objects such as spice harvesters.
The smell of the sandworm has been particularly documented. A strong, flinty, cinnamon smell exuded from the beast, especially from the mouth. Some said it could be smelled before seen. The presents of the spice melange was intense and so was its odor.
The approach of a sandworm towards its breach-point was often indicated by the dry lightning that frequently occurred in the area; a result of static electricity being discharged into positively-charged air.
The main component of the sandworm's diet was sand, and other inorganic and dry components of the Arrakis crust. It is also believed they sifted the sand-plankton for nourishment.
Water was fatal to a sandworm, even in small doses. Water that entered a sandworm's body would act as catalyst to accelerate its metabolism to the point that it became unstable and its life support failed. This was a violent and presumably painful death for the sandworm. It was necessary however, in so far that the byproduct of the sandworm/water mixture was the highly toxic poison called the Water of Life, which the reverend mothers used on various occasions.
Creation of Sandworms
The process of sandworm creation began when sandtrout banded together after converging on a store of water deep beneath the surface of Arrakis. Indeed, water did occur naturally on Arrakis. However, due to the aforementioned process, it was always destroyed. The sandtrout/water mixture was then converted it into a liquid chemical that the sandworm was capable of digesting without being poisoned. On a side note, this chemical could erupt up to desert's surface in a violent explosion called a pre-spice mass.
The sandtrout that survived this event would then coalesce and complete the metamorphosis into a young sandworm.
Cultural Impact of the Sandworm
Insofar as the sandworm was essential to the creation of the spice melange, on a macro scale the sandworm had an enormous impact on humanity.
To the planet's Fremen population, the creature was a spiritual symbol of their faith and saw them as physical embodiments of the One God of their original Zensunni religion. Within Fremen culture the sandworm had several additional names, notably The Maker and Shai-Hulud, which variously meant Old Man of the Desert, Old Father Eternity, or Grandfather of the Desert
Decline of the Sandworm
After the rise of the Atreides Empire and the propagation of the Arrakis-variant of the Zensunni religion across the known universe, the reverence paid to the sandworm spread to other worlds. This continued through the rule of Leto Atreides II, due to the fact that he had become something of a hybrid, both man and worm.
The terraforming of Arrakis posed a grave risk to the sandworm, which found life outside the arid desert fatal. The terraforming reversal process had begun by the end of Leto's reign, and he himself devolved back into sandtrout at his death. These events saw the sandworm once again thrive on Arrakis for approximately another 1500 years. During Leto II's reign some smaller sandworms were also removed and shipped off with colonizing vessels during the Scattering. This exercise yielded questionable success.
The hostile actions taken by the Honored Matres saw the termination of all life on Arrakis, including the remaining sandworms. However, this was not before Miles Teg and Darwi Odrade had managed to capture a sandworm. Held in an artifical environment on Chapterhouse, the secret and temporary base of the Bene Gesserit Sisterhood, this worm would have been the key to re-seeding its population