Which animals are known for having scales?

Reptiles are well-known for having scales that cover their bodies, which serve several important functions. The scales provide protection against environmental elements, help prevent water loss, and offer defense mechanisms against predators. These keratinized structures are adapted to a terrestrial lifestyle and contribute to the unique adaptations reptiles have developed for survival in various habitats.

While birds have feathers that may superficially resemble scales, these are distinct from the scales found in reptiles. In contrast, amphibians typically have moist skin without scales, which is crucial for their respiration and water absorption, while mammals are characterized by fur or hair rather than scales. Thus, the presence of scales is a defining characteristic of reptiles.