Despite these promising benefits, research on turmeric’s long-term effects remains limited, particularly regarding its impact on gut microbiota, nutrient metabolism, and disease resilience over extended production cycles. Furthermore, there is a lack of studies on optimal inclusion levels, potential synergies with other plant-based additives, and its effects on fish welfare parameters such as stress reduction and behavioral improvements. Addressing these gaps is crucial for maximizing its efficacy in aquaculture systems. This review critically examines the current knowledge on Curcuma longa as a feed additive, emphasizing its role in enhancing fish health and sustainability. It also highlights key research gaps and proposes future directions for optimizing turmeric-based aquafeeds. By integrating phytogenic supplements such as turmeric, aquaculture can advance toward more sustainable, efficient, and resilient production systems that support fish health, welfare, and environmental conservation