Amphibia

Amphibia is a class of cold-blooded vertebrates that includes amphibians such as frogs, toads, salamanders, and newts. They typically have a life cycle that begins with aquatic larval stages (like tadpoles) and transitions to land-dwelling adults. Amphibians have permeable skin that absorbs water and respired through it, making them sensitive to environmental changes. They often require moist habitats and play essential roles in ecosystems as both predators and prey. Their unique “dual life” links aquatic and terrestrial environments, and they are important indicators of environmental health due to their sensitivity to pollution and habitat loss.