K-Series

The K-Series Xenomorphs are aliens bred by human scientists after they had captured some of the aliens, hoping to use them as bio-weapons. The K-Series aliens are also know as yellow aliens, because of their yellow skin. These xenomorphs have all of the same species as the normal aliens do, including the queens' ability to upgrade the other aliens and herself.

History
The K-Series eventually escaped from the human lab and began using them as hosts, much akin to their far more common brethren. Within the lab they constructed their hive, which was finally wiped out (in Mission 4) after a large group of alien eggs hatched facehuggers, creates a queen, and make a hive of their own. Their species was eventually completely destroyed by the regular "black" aliens, who did not tolerate any genetic changes with their species.

Seen In

 * Aliens versus Predator:Extinction