Igarapé Iazinho is a small, blackwater stream located in the Amazonas state of Brazil, flowing near the Rio Daraá, which itself is a tributary of the vast Rio Negro system. These igarapés, or forest creeks, are a defining feature of the Amazonian landscape, characterized by their dark, tea-colored water stained by tannins from decaying vegetation. The water is typically soft and acidic, with a substrate composed of fine sand, leaf litter, and submerged branches and roots that create complex habitat. The surrounding dense, flooded forest provides a rich, shaded environment that supports a unique aquatic ecosystem.