Scales are little plate-molded dermal or epidermal structures that are found in the external skeletons of fish, reptiles, or a few well evolved creatures. The skeletons of numerous vertebrates are covered by two sorts of scales, specifically epidermal and dermal. Epidermal scales start from the malpighian layer of the epidermis. Such scales are found in earthly vertebrates like reptiles, birds and warm blooded animals.