Chromatophores (image) Harvard John A. Paulson School of Engineering and Applied Sciences Share Print E-Mail Caption Left: Cuttlefish chromatophores change from a punctuate to expanded state in response to visual cues. The scale bar measures one millimeter. Right: This illustrated cross-section of the skin shows the layering of three types of chromatophores. Iridophores and leucophores would be positioned beneath the chromatophores. Credit Images courtesy of Lydia Mathger, Marine Biological Laboratory. Usage Restrictions Must give credit. Share Print E-Mail 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.