The xenomorph

The xenomorph is an extraterrestrial species characterized by its aggressive and predatory nature. It possesses a biomechanical exoskeleton, a long tail, and a distinctive elongated head with sharp teeth. Created through a parasitic process that involves using hosts, usually humans. You’ve found this one on your spaceship but it doesn’t seem as aggressive as most other ones. (Sorry about the voice, couldn’t find a better one)