Drifters used to track ocean currents (IMAGE) University of California - San Diego Caption Brian Stock prepares to deploy drifters, which track ocean currents, into plumes of fertilized eggs from spawning Nassau grouper off Little Cayman, Cayman Islands. Image credit: Andy Mullen (Scripps) Credit Andy Mullen (Scripps Institution of Oceanography/UC San Diego) Usage Restrictions Must use image credit License Original 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.