Guppy blue iridescent spot (IMAGE) PLOS Caption Cumana, blue iridescent spot Credit Verena A. Kottler, 10.1371/journal.pone.0085647.g002 Usage Restrictions CC-BY License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.