leucophores (reflective white): found in some fish, utilize crystalline purines (often guanine) to produce a reflective, shiny, white colour.iridophores (reflective/iridescent): sometimes called "guanophores", reflect light using plates of crystalline chemochromes made from guanine.These are just a few examples of animals with this quality, but it is most pronounced in the butterfly family. Animals that show iridescence include mother of pearl seashells, fish, and peacocks. Structural colour differs according to the observer's position whereas pigments appear the same regardless of the angle-of-view. The multiple reflections compound one another and intensify the colours. Light typically passes through multiple layers and is reflected more than once. ![]() The structures themselves are colourless.
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