CTD (IMAGE) Woods Hole Oceanographic Institution Caption WHOI researchers gathered seawater samples using an instrument called a rosette -- a rose-like array of 36 bottles that can be individually opened and closed to collect samples at different locations and depths in the ocean. Credit Photo by Alison Macdonald, Woods Hole Oceanographic Institution Usage Restrictions for news purposes only with proper credit 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.