The term for animals that can live both in water and on land is "amphibians." This group includes frogs, toads, salamanders, and newts. Amphibians have a unique life cycle that typically involves both aquatic and terrestrial stages; for instance, frogs hatch from eggs in water as larvae (tadpoles) and eventually metamorphose into adult forms that can live on land. Their skin is porous, allowing them to absorb water and breathe through it, which makes them particularly vulnerable to environmental changes. Amphibians play essential roles in ecosystems as both predators and prey and are indicators of ecosystem health.