How Plankton Gets Jet Lagged (IMAGE) European Molecular Biology Laboratory Caption Every night, an increase in melatonin levels in this larva's brain makes it move away from the sea's surface. Credit EMBL/M.A.Tosches Usage Restrictions EMBL press and picture releases including photographs, graphics and videos are copyrighted by EMBL. They may be freely reprinted and distributed for non-commercial use via print, broadcast and electronic media, provided that proper attribution to authors, photographers and designers is made. 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.