Larva of Platynereis (image) National Institutes of Natural Sciences Share Print E-Mail Caption Larva of Platynereis possesses photoreceptor cells in the brain. In the cells, a UV-sensitive opsin receives and transmits ambient UV signals, probably resulting in regulation of circadian behaviors such as diel vertical migration. Credit INSTITUTE FOR MOLECULAR SCIENCE Usage Restrictions None 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.