It has no arms or legs, but possesses a powerful tail which allows it to attack and hide in trees. It also possesses a wide hood similar to that of a cobra, which it spreads before spitting acid at its victims.
- The two mandibles on the upper jaw of the Snake Alien are likely inherited from the host's fangs.
- The Snake Alien's hood and ability to spit acid point to the host being a spitting cobra, which also has a hood and can spit venom.
- The snake alien also appeared in the non-canon Aliens arcade game, but it was smaller and smoother. It was also colored orange, unlike the Kenner snake alien with was gold, black and dark green.
- The snake alien was one of the bosses in SNES Alien vs Predator but it was silver with a regular pink crest and average alien jaws.