Franco Banfi / Aquatic plants growing on bottom of the main spring at Rio Sucuri, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Piraputanga fish (Brycon hilarii) split level, in the main spring at Rio Sucuri, Bonito, Mato Grosso do Sul, Brazil.

Franco Banfi / Photographer Franco Banfi snorkeling in search of fish in the Rio Sucuri, Bonito, Mato Grosso do Sul, Brazil

Michel Roggo / Rio Sucuri, Bonito area, Serra da Bodoquena (Bodoquena Mountain Range), Mato Grosso del Sul, Brazil, November 2011. Taken for the Freshwater Project.

Franco Banfi / Split image of the main spring, Rio Sucuri, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Aquatic plant in the main spring at Rio Sucuri, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Man Snorkeling in Rio Sucuri, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Photographer Franco Banfi snorkelling in search of fish in the Rio Sucuri, Bonito, Mato Grosso do Sul, Brazil

Franco Banfi / Riverbed covered with aquatic plants in the main spring at Rio Sucuri, Bonito, Mato Grosso do Sul, Brazil.

Franco Banfi / Mounds of loose sand on riverbed, formed by rising spring water, Rio Sucuri, Bonito, Mato Grosso do Sul, Brazil.