Biofluorescence, the absorption of high-energy light and its reemission at lower energy wavelengths, is widespread across vertebrate and invertebrate lineages, especially fishes. According to two studies led by the American Museum of Natural History, fish biofluorescence dates back at least 112 million years and, since then, has evolved independently more than 100 times, with the majority of that activity happening among fish that live on coral reefs. Phylogeny...
