Rio Pirabeiraba is a river flowing through the municipality of Joinville in the state of Santa Catarina, Brazil, situated within the Cubatão Norte hydrographic basin. Nestled in the coastal Atlantic Rainforest region, this river runs through a landscape shaped by the rich biodiversity of one of the world's most ecologically significant biomes. Sampling sites along the river have been recorded at elevations around 43 meters above sea level, placing it in the lowland coastal zone where the river meanders through subtropical forest terrain before contributing to the broader Cubatão Norte drainage system. The river's setting within the Atlantic Rainforest corridor gives it a lush, verdant riparian character, with dense forest canopy shading much of the waterway and contributing organic matter that supports the aquatic food web.