Underwater microscope (IMAGE) University of California - San Diego Caption The underwater microscope that researchers towed behind their boat to capture photos of plankton and Nassau grouper eggs for the study. Its wings allowed it to control its depth. Image credit: Andy Mullen (Scripps Institution of Oceanography/UC San Diego) 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.