The term for an animal that can live in both aquatic and terrestrial environments is “amphibian.” Amphibians are a group of animals that typically have a life cycle that includes both water and land phases. They usually start their lives as larvae in water, breathing through gills, and later metamorphose into adults, developing lungs to breathe air. Common examples of amphibians include frogs, toads, and salamanders. Amphibians are unique in that their permeable skin allows for both respiration and absorption of water, making them highly dependent on their environments to maintain hydration.