The application dimension of Aquatic Feed Supplements segmentation classifies products according to the primary physiological outcome they target in cultured species. Growth promotion supplements, typically formulated with amino acids, vitamins, and digestibility enhancers, dominate the market by driving feed conversion efficiency and overall biomass yield. Immune‑support supplements, incorporating β‑glucans, nucleotides, and trace minerals, address disease susceptibility and reduce reliance on chemotherapeutics, thereby contributing a growing share of revenue as biosecurity concerns intensify. Reproduction‑enhancement additives, such as gonadotropin‑releasing hormone analogs and fatty‑acid complexes, are essential for broodstock conditioning and directly influence fry output, positioning them as a niche but high‑value segment. Stress‑mitigation formulations, often containing adaptogenic herbs and antioxidants, help maintain performance under suboptimal water quality or handling stress, expanding their relevance in intensive systems. Finally, disease‑prevention vaccines and probiotic blends provide prophylactic protection, aligning with regulatory trends favoring reduced antibiotic usage. Together, these application categories shape the overall market size by allocating capital to distinct functional outcomes, a core element of the market taxonomy.