Biodiverse kelp forest (IMAGE) Oregon State University Caption The seafloor at this San Nicolas Island monitoring site exhibits an incredible diversity of invertebrates and algae. While urchins are present at these sites, they were not observed to form urchin-barrens in the nearly 40 years of subtidal monitoring (photo taken 2018). Credit Photo provided by Zachary Randell. Usage Restrictions None 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.