Female crab in eelgrass (IMAGE) Smithsonian Caption A female blue crab in eelgrass. Seagrasses, a critical refuge for juvenile blue crabs, are among the many habitat-forming species the National Ocean Biodiversity Strategy seeks to preserve. Credit National Oceanic and Atmospheric Administration Usage Restrictions No restrictions. License Public Domain 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.