Nudibranch color diversity shares a common physical basis in guanine photonic structure ‘pixels’

Proceedings of the National Academy of Sciences, Volume 123, Number 12, March 2026.
SignificanceNudibranchs are an extraordinarily diverse group of marine animals, renowned for their dazzling range of colors and striking patterns. Although their pigmentary coloration is well understood, until now, structural coloration has been largely…