"Alien" is a classic science fiction film directed by Ridley Scott. It features a diverse array of terrifying creatures, but primarily focuses on the Xenomorph, an extraterrestrial species with a life cycle that involves a parasitic embryo called a facehugger and a fully grown, highly aggressive creature known as the xenomorph. While the Xenomorph itself is not a marine creature, it does have some aquatic adaptations, such as the ability to survive in various environments, including underwate...