 In addition to simply reflecting light of a specific wavelength, the helicoid structure also causes light of other wavelengths to be modified so that the wavelength converges to within a narrow range before being reflected, which acts to amplify the light at that specific wavelength.This process of constructive interference produces the most intense coloration of any living organism.The total reflectivity is about 30% of that of a silvered glass mirror, and is the highest of any known biological material.