Off Sisan Islan, South Korea, seaweed is often grown in grids, hung from ropes held near the surface with buoys. This ensures the seaweed stays close enough to the surface to get enough light during high tide but doesn’t scrape against the bottom during low tide; NASA Earth Observatory [1200 x 794]

Off Sisan Islan, South Korea, seaweed is often grown in grids, hung from ropes held near the surface with buoys. … More

Off Sisan Islan, South Korea, seaweed is often grown in grids, hung from ropes held near the surface with buoys. This ensures the seaweed stays close enough to the surface to get enough light during high tide but doesn’t scrape against the bottom during low tide; NASA Earth Observatory [5000 x 5000]

Off Sisan Islan, South Korea, seaweed is often grown in grids, hung from ropes held near the surface with buoys. … More