This research activity aims to classify fish species based on their taxonomic classification. The study will involve the identification of different families of fish, including Hypostominae, Heteropneustidae, Percinae, Clupeidae, Xenocyprididae, Tincidae, Petromyzontidae, Gobioninae, Danionidae, and Poeciliinae. The classification will be based on the characteristics of each family, such as their physical features, habitats, and behaviors. The study will provide a comprehensive understanding of the diversity of fish species and their classification. The research will also explore the importance of taxonomic classification in understanding the evolution and ecology of fish species. The findings of this study will contribute to the development of conservation strategies for fish species and their habitats.