Called ruukha in the language Coraabish and ruuko in the language Mogra.
Ruuk is a term referring to a numerous group of breeds of higher fauna of the Xenozone.
Ruuks are complex organisms with various bases (depending on their homeworld). The most common basic elements are carbon, silicon, nitrogen, phosphorus, or boron, rarely also buroten, di-buroten, or tri-buroten.
The vast majority of ruuk breeds possesses one or more pairs of limbs and strong muscles. Ruuks are slithering, running, or flying. They are perfectly adapted to their specific environment, which makes it however also very difficult to transport to new areas - experience like the Ulgoriad are clear.
Centuries of selective breeding experiments resulted in many ruuk breeds changing into agriculturally or industrially useful creatures. Outside of the Xenozone though, their numbers remain low. The undisputed leader in ruuk numbers is Annor.
Estimated numbers of bred ruuks (4255 Tu)
Annor - 151,670,000,000 ruu
Khalfass - 41,100,000,000 ruu
CuCaan - 34,955,000,000 ruu
The numbers take into account all planets with documented breeding.
Ruuk hunting has been on dramatic rise in the last centuries. Ruuks are killed by thousands as an aristocratic pastime or because of poachers. It is said that the ruuk trade in Coraabia has rose thousand times in the last thousand Tu.
List of all known ruuks