Italian crested newt
When newts are inactive or in oxygen-rich environments, respiration can be done through their skin which accounts for 74% of the cutaneous respiration. However, oxygen-poor environments, such as stagnant ponds, pose a threat to the survival of larval newts. This is because oxygen molecules do not readily dissolve in water, and as "T. carnifex" is an immobile animal, extracting oxygen from water is difficult. Newts consequently have external gills at birth that persist until metamorphosis, which assists survival in low-oxygen conditions.
Aliens (film)
Ripley and Newt fall asleep in the medical laboratory, awakening to find themselves locked in the room with the two "facehuggers", which have been released from their tanks. Ripley triggers a fire alarm to alert the Marines, who rescue them and kill the creatures. Ripley accuses Burke of releasing the facehuggers so that they would impregnate her and Newt, allowing him to smuggle the embryos past Earth's quarantine, and of planning to kill the rest of the Marines so that no one could contradict his version of events. Before the Marines can kill Burke, the power is cut, and aliens assault through the ceiling. In the ensuing firefight, Burke attempts to flee but is cornered by an alien, while Hudson is dragged away after covering the others' retreat. Gorman and the injured Vasquez detonate a grenade and sacrifice themselves; Hicks is injured, and Newt is captured.