Spaihts original script the "Beluga Xenomorph" was hinted at being the original form/source of the typical Xenomorphs that we all know and love. This would imply that the Beluga's were their own species that the Engineers discovered and "Weaponized", modifying them and improving them to be used for warfare.



This makes sense, as it seems like the Engineers bestowed many of their traits onto their Xenomorph such as their dark exoskeletons which bare a striking resemblance to the chair suits worn by the Engineers (Alternatively, their suits might have been made AFTER weaponizing the Xeno's, made to be able to withstand the Xeno's acidic blood).



When I first read the information presented I was confused as to why the Engineers would have taken away the Xeno's ability to alter their body shape, until I realized that they probably did this as a way to control them, as a Body-Altering Xenomorph would be too dangerous to use as efficient tools.

Attempted to draw the Beluga Xenomorph as seen in the scrapped concept artwork for Alien: Engineers, a masterpiece of a movie concept which would go on to be mutilated and deformed, eventually becoming the vastly less awesome film Prometheus.As taken from the Wiki:"The Beluga-Xenomorph, also known as the "Holloway Alien" after its host, was a Xenomorph creature cut from Prometheus early in its production. In Jon Spaihts' original script, titled Alien: Engineers, the creature stalked and killed several crew members of the Magellan. Its role was entirely written out of the finished film.Unlike other Xenomorphs, which are encased in rigid, black exoskeletons, the Beluga-Xenomorph is described as being ivory white and boneless, the latter of which allows it to alter its body shape and become a gelatinous, amorphous blob, allowing it to squeeze through gaps that would otherwise be too small for it. Its skin is vaguely translucent, and at the front of its elongated skull, a human-like skull can be seen beneath. It has long, spindly limbs, and jaws that can lever forwards out of its mouth (a trait given to the Deacon in Prometheus)"More information on Alien: Engineers can be found here: avp.wikia.com/wiki/Alien:_Engi… In