Fish nutrition is essential for optimal growth, health, and production in aquaculture. Nutritional requirements vary by species, but a balanced diet rich in proteins, lipids, vitamins, and minerals is crucial. Proper nutrition boosts immune responses, enhances feed conversion, and minimizes waste, benefiting both fish and the environment. Traditional fishmeal is being supplemented by plant-based proteins and innovative alternatives to reduce environmental impact and costs. Optimizing nutrition ensures high-quality, sustainable fish production while addressing ecological concerns. A well-nourished fish population not only yields better products but also enhances the sustainability and economic viability of aquaculture.