The Vorashi evolved from the survivors of a third colony ship during the Gyllean Project. They landed on a world the exact opposite of either the Commati or the Grokk, with it being a world of vast, relatively flat deserts. Being ectothermic, they lucked out when their colony ship crash landed on the surface, and most of it remained intact thanks to the density of the sands, allowing the use of life support systems - mainly in the form of air conditioning - to keep them alive. However, nothing lasts forever, and as these systems powered down over the course of many generations, and eventually they had adapted quite well to the heat, but not well enough to be comfortable. For this, they began to burrow into the sand, which eventually lead to them being capable of a style of movement known as sandswimming.
They have since evolved third eyelids to properly keep out sand and wind, and can swim through sand at incredible speeds, allowing them to leap clear of the sand only to dive back in again.
Perhaps the least known of all the offshoots species, the Vorashi do not often leave their homeplanet, preferring to swim freely amongst the sands. Those that do go off world tend to choose similar planets to inhabit, although not all do so.