The Amazon River is the largest river basin in the world, covering over 6.9 million square kilometers in South America. During the rainy season, the river averages 40 meters deep and 40 kilometers wide, while the flooded area triples to over 350,000 square kilometers. The Amazon Rainforest contains over one third of the world's species and the river itself is home to more than 3,000 recognized fish species.
2. Amazônia- Rio Amazonas The AmazonRiver, the largest drainage basin in the world, covers an area of some 6,915,000 square kilometres (2,670,000 sq mi), or some 40 percent of South America. The average depth of the river in the height of the rainy season is 40 m (131 ft) and the average width can be nearly 40 km (25 mi) The area covered by the water of the River and its tributaries more than triples over the course of a year. In an average dry season 110,000 square kilometres (42,000 sq mi) of land are water-covered, while in the wet season the flooded area of the Amazon Basin rises to 350,000 square kilometres (135,000 sq mi) At its widest point the Amazon River can be 11 kilometres (7 mi) wide during the dry season, but during the rainy season when the Amazon floods the surrounding plains it can be up to 45 kilometres (28 mi) wide . More than one third of all species in the world live in the Amazon Rainforest, a giant tropical forest and river with an area that stretches more than 5,400,000 km² (2.1 million square miles) and is among the richest tropical forests in the world. Amazon river has over 3,000 recognized species of fish and that number is still growing
