The Beluga-Xenomorph was a Xenomorph cut from Prometheus early in its production. It was originally going to be the creature born from Charles Holloway after he was impregnated by an Octo-Facehugger from one of the molluscoid Eggs found in the Pyramid. The creature is only mentioned in the script for an Alien prequel written by Jon Spaihts. The Beluga-Xenomorph started off as a boneless octopus-like Chestburster that is able to squeeze itself under doors and through the bars of the ventilation system. After developing further it kills several crew members before it is itself killed by Jocelyn Watts.
Originally, James Cameron had planned to include white-colored Xenomorphs in Aliens; they would be smaller than their Warrior counterparts and act as a worker caste within the Hive, building and maintaining the structure of the nest and possibly tending to the immobile Queen.