The term for animals that live both in water and on land is "amphibians." Amphibians belong to the class Amphibia and include creatures such as frogs, toads, salamanders, and newts. They are characterized by their life cycle, which typically includes a larval stage that is aquatic (often resembling fish) and a terrestrial adult stage. Amphibians have moist skin that helps with respiration, and they often depend on water bodies for reproduction, making them vulnerable to environmental changes and habitat loss.