Seagrass in Puget Sound (IMAGE) Oregon State University Caption This is Zostera marina, also known as eelgrass, in Puget Sound, near Possession Sound, Washington. Credit Oregon State University Usage Restrictions None 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.