The aquaculture application segment, though smaller at roughly 10 % of the market, is experiencing accelerated growth due to increased freshwater and marine fish farming, especially of species such as Rohu, Catla, and shrimp. Vitamin H is added to pelleted feeds to improve skin pigmentation, fin integrity, and overall metabolic health, which are critical for market‑grade appearance and survival rates. Demand is propelled by government subsidies for aquaculture development, rising export-oriented shrimp production, and the shift toward high‑density recirculating aquaculture systems that require precise nutrient balancing. While dosage levels are modest (1–3 mg kg⁻¹), the rapid scaling of feed production—projected to exceed 5 Mt by 2029—translates into a notable share of the overall market value. The segment’s trajectory is closely linked to sustainability mandates and the adoption of fortified feed formulations to meet stringent quality standards.