The Mongolian Death Worm is a cryptid purported to exist in the Gobi Desert. It is generally considered a cryptozoological creature; one whose sightings and reports are disputed or unconfirmed.
It is described as a bright red worm with a wide body that is 0.6 to 1.5 meters (2 to 5 feet) long. In general, scientists reject the possibility that such mega-fauna cryptids exist, because of the improbably large numbers necessary to maintain a breeding population and because climate and food supply issues make their survival in reported habitats unlikely.
The local name is allghoi, which means “blood filled intestine worm" because it is reported to look like the intestine of a cow. It is the subject of a number of extraordinary claims by Mongolian locals—such as the ability of the worm to spew forth sulfuric acid that, on contact, will turn anything it touches yellow and corroded (which would kill a human), and its purported ability to kill at a distance by means of electric discharge.
Said to inhabit the Southern Gobi Desert in Mongolia, the first reference in English to this remarkable beast appears in Professor Roy Chapman Andrews 1926 book On the Trail of Ancient Man, although the American palontologist (apparently the inspiration for the Indiana Jones character) was not entirely convinced by the tales of the monster he heard at a gathering of Mongolian officials: None of those present ever had seen the creature, but they all firmly believed in its existence and described it minutely.
Czech Explorer Ivan Mackerle:
"Sausage-like worm over half a metre (20 inches) long, and thick as a mans arm, resembling the intestine of cattle. Its tail is short, as [if] it were cut off, but not tapered. It is difficult to tell its head from its tail because it has no visible eyes, nostrils or mouth. Its colour is dark red, like blood or salami.
It moves in odd ways either it rolls around or squirms sideways, sweeping its way about. It lives in desolate sand dunes and in the hot valleys of the Gobi desert with saxaul plants underground. It is possible to see it only during the hottest months of the year, June and July; later it burrows into the sand and sleeps. It gets out on the ground mainly after the rain, when the ground is wet. It is dangerous, because it can kill people and animals instantly at a range of several metres.”
The creature is reported to be able to spray an acid like substance that causes death instantly. It is also claimed that this creature has the ability to kill from a distance with some sort of super charged electrical charge.