Metamorphosis is a biological process by which an organism physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the organism’s body structure through cell growth and differentiation. Some insects, amphibians, mollusks, crustaceans, cnidarians, echinoderms, and tunicates undergo metamorphosis. This process manifests itself in diverse ways across species from butterflies to frogs. For example, in Lepidoptera (moths and butterflies), metamorphosis involves four stages: egg, larva, pupa, and adult. In contrast, amphibians such as frogs experience only three stages: egg, tadpole or larva stage followed by adulthood. Metamorphosis is distinct from other forms of physical change as it includes both internal (such as hormonal) and external (such as environmental) triggers while providing survival advantages at different life stages for these organisms.