The term for the scientific study of fish is "ichthyology." This branch of zoology focuses on the biology, behavior, ecology, and taxonomy of fish. Ichthyologists research various aspects of fish life, including their anatomy, physiology, and habitats, contributing to our understanding of aquatic ecosystems. They play a crucial role in conservation efforts, examining fish populations and addressing the impacts of overfishing, pollution, and climate change on aquatic environments. Ichthyology not only enhances our knowledge of fish but also serves broader ecological and environmental research that is vital for sustainable management of fish resources.