Unhealthy kelp (IMAGE) Oregon State University Caption Unhealthy kelp forest damaged by sea urchins. Credit GEMM Lab, Marine Mammal Institute, Oregon State University. Usage Restrictions Media use only 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.