 In this study, researchers investigated the feeding habits of fishes living in the Rosana Reservoir, southeast Brazil. They observed nine species of fish, including hemogrammus marginatus, roboids parinensis, hyphosobricon Iques, astionax ultiparini, serosalmos spiloplura, and bryconomericus striminius. These fish were found to be either invertevores or algevores, depending on their diets. Invertevorous fish such as hemogrammus marginatus, roboids parinensis, and hyphosobricon Iques fed primarily on aquatic insect larvae. Algeovorous fish such as astionax ultiparini, serosalmos spiloplura, and bryconomericus striminius fed primarily on filamentous blue-green algae, diatoms, and periderm. This indicates that these fish have distinctly different feeding strategies, which may help explain why they coexist peacefully in the same environment. This article was authored by El-Kassadi, H. F. Mendez, and K. M. Ferreira.