The Pantanal is the world’s largest freshwater wetland, a seasonally flooded plain fed by the tributaries of the Paraguay River. At 68,000 square miles, it is more than 20 times the size of the Everglades. The Pantanal is also one of the world’s most productive habitats. Annual floods, fed by tropical rains, create a giant nursery for aquatic life, including 260 species of fish.