Adrenaline and triiodothyronine modify the iron handling in the freshwater air-breathing fish Anabas testudineus Bloch: Role of ferric reductase in iron acquisition

► Ferric reductase, a membrane-bound enzyme, is crucial in the process of iron acquisition. ► Adrenaline and triiodothyronine (T3) are the vital metabolic hormones in fish. ► Adrenaline and T3 regulate the storage and handling of iron in freshwater fish. ► FR, sodium and proton pumps are involved in fish gill Fe acquisition.