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Biodiverse river basins.

The Amazon holds 3, 000 species of fresh water fish species within the boundaries of its basin whose function it is to disperse the seeds of trees.

One of its key species, the Piramutaba catfish, Brachyplatystoma vaillantii, migrates more than 3, 300 km ( 2, 051 miles ) from its nursery grounds near the mouth of the Amazon River to its spawning grounds in Andean tributaries ( 400 m or 437 yards above sea level ) distributing plants seed along the route.