Alien

Alien's powers and abilities

Durability

Adverse extremes of temperature appear to have little, if any, affect on their physical prowess. In fact, physiologically they are incredibly hardy creatures ? aside from being unaffected by temperature extremes that would quickly incapacitate or kill a human, they are capable of surviving in the hard vacuum of space, at least for a limited period of time. One Alien on Fiorina 161 was even known to survive several tons of molten lead being poured onto it.

Jaw

The Xenomorphs' primary weapon is their inner pharyngeal jaw, which is capable of shooting from their mouth like a piston with sufficient power to smash through bone and metal. In fact, a common tactic used by the creatures to eliminate prey is to restrain the victim with their hands, immobilizing them, before killing them with a precision jaw strike to the head, piercing through the skull and penetrating the brain; this form of attack is colloquially known as a "Headbite".

Acid Blood

Xenomorph blood is an extremely potent and concentrated molecular acid that can corrode on contact almost any substance with alarming speed. It is dull yellowish-green in color, and seems to be pressurized inside the body so that it spurts out when wounded, as a defensive measure. This blood can prove incredibly problematic when encountering Xenomorphs aboard a starship, as using traditional firearms or explosives to attack the creature will potentially cause its blood to leak out in sufficient quantity to eat through the hull of the ship.

Semi-Dexterous Tail

The tails have been shown grasping prey and used as spears or flails.

Wall Climbing

Aliens have proven to be adept wall climbers, whether that is a result of digging into surfaces with their claws, finding hand-holds, or through some adhesive effect such as those used by geckos or insects has not been demonstrated.