Amino acids play a crucial role in the nutrition of fish, shrimp, and crabs. They are the building blocks of proteins and are involved in various physiological functions. Here is an overview of the benefits of using amino acids in the diets of these aquatic species: • Essential for protein synthesis: Amino acids are essential for protein synthesis, which is vital for growth, muscle development, and tissue repair in fish, shrimp, and crabs. Including the necessary amino acids in the diet ensures that the required building blocks are available for optimal protein synthesis. • Growth promotion: By providing an adequate supply of essential amino acids, the growth rates of fish, shrimp, and crabs can be improved. Amino acids act as precursors for muscle protein synthesis, supporting the growth and development of these aquatic species. • Improved feed efficiency: Including balanced levels of amino acids in the diet helps optimize nutrient utilization and feed efficiency. Amino acids are involved in various metabolic processes, and their presence ensures that other nutrients, such as carbohydrates and lipids, are utilized effectively for energy production and growth rather than being wasted. • Enhanced immune function: Certain amino acids, such as glutamine, arginine, and cysteine, play essential roles in immune function. They support the production of immune-related molecules, enhance the activity of immune cells, and contribute to improved disease resistance in fish, shrimp, and crabs. • Stress tolerance: Amino acids, particularly tryptophan, methionine, and threonine, have been associated with stress mitigation in aquatic species. They are involved in the synthesis of neurotransmitters and hormones that regulate stress responses, helping fish, shrimp, and crabs cope with stressful conditions such as handling, transportation, and environmental changes. • Improved reproductive performance: Amino acids, including arginine and histidine, are involved in reproductive processes and can contribute to improved reproductive performance in fish, shrimp, and crabs. They support gonadal development, hormone synthesis, and the production of quality gametes. • Nutrient balance and waste reduction: Including the proper balance of amino acids in the diet helps optimize nutrient utilization and reduces the production of metabolic waste. This contributes to improved feed efficiency, reduced environmental impact, and better water quality in aquaculture systems. The inclusion levels and balance of amino acids in the diets of fish, shrimp, and crabs should be based on the specific nutritional requirements of each species, their life stage, health status, and the composition of the overall diet. Precise formulation and optimization of amino acid profiles can help achieve optimal growth, feed efficiency, immune function, stress tolerance, reproductive performance, and overall health in these aquatic species. Consultation with an aquaculture nutritionist or veterinarian experienced in the specific species is recommended to determine the appropriate inclusion levels and benefits of amino acid supplementation in the diets of fish, shrimp, and crabs.