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Aquaculture is a crucial sector in the global food system, signifcantly contributing to the supply of nutritious food and creating economic opportunities. This review article examines the essential role of vitamins in fsh farming, highlighting their contributions to growth performance, immune function, antioxidant activity, digestive efciency, disease resistance, and overall body composition. Vitamins are not only vital nutrients for the growth and metabolic functions of aquatic organisms but also serve as essential cofactors in numerous biochemical reactions, thereby promoting fsh health and development. Recent innovations in aquafeed formulations and vitamin nutrition have led to a reassessment of the dietary vitamin needs for various farmed fsh species. This review synthesizes contemporary research in fsh nutrition, demonstrating the substantial efects of vitamins on growth rates (up to 20%), immune response enhancement (up to 40%), optimization of digestive and hepatic enzyme activities, and improvement of biochemical and hematological parameters. The magnitude of these benefts is infuenced by factors such as vitamin type, fsh species, age, and environmental conditions. Additionally, the review highlights the signifcance of vitamins in enhancing disease resistance and improving body composition in aquaculture species. The insights provided aim to guide aquaculture professionals and researchers in recognizing the critical role of vitamins in fostering sustainable fsh farming practices. Future research in fsh nutrition should prioritize the development of sustainable vitamin supplementation strategies, including the exploration of plant-based and microbial vitamin sources, the optimization of nutrient delivery methods, and the reduction of environmental impacts. By focusing on these areas, we can enhance fsh health, improve feed efciency, and promote more environmentally sustainable aquaculture practices.