This photo captures a hermit crab (Pagurus bernhardus) as it forages in a patch of eelgrass, using its borrowed shell as both protection and a means of movement. The eelgrass provides a rich habitat for small invertebrates and algae, which the hermit crab feeds on as it scurries through the seagrass. The photo is an example of the diverse and intricate interactions that take place in seagrass ecosystems.