Amphibious/æmˈfɪbiəs/ Definition 1 of 3Pro Tip 1/2Natural Habitats Amphibious creatures are common in wetlands and coastal regions. Frogs are often found in amphibious environments. Pro Tip 2/2Biological Adaptation The term highlights an organism's adaptations to survive in both environments. Amphibious animals have skin that can breathe both in water and air.