Scalies are a mutant strain of abhuman found in the underhive which have stabilised over time, although there is still a lot of variation, and are not as stable other abhumans found in the Imperium, like Ogryns and Ratlings.
Scalies are massive reptillian mutants almost as broad as they are tall. Their durability and strength are legendary among the people of the Underhive and have a fearsome reputation. Like some reptiles they have the abillity to regenerate lost limbs and their thick skin acts as a natural armour.
They are rarely seen but it is said that they are by far the most numerous denizens of the Underhive. They are undoubtedly intelligent but seldom speak due to their twisted mutated necks and voice boxes having changed beyond the ability of normal human speech. So little is known about their origins or if there are hidden clans or tribes of Scalies in the most severely polluted badzones in the Underhive.
When fighting they often use close combat weapons and discuses or throwing axes. They are also used as heavy weapons men by Scavvies using portable bolt throwers called Spear guns or Scatter Cannons, a large form of blunderbuss.