Bay leaf (Syzygium polyantha) is one of the phyto-pharmacy plants which contains chemicals such as essential oils, tannins, flavonoids, saponins and triterpenoids which function as antibacterial, antioxidant, and anti-inflammatory. The purpose of this research was to see the changes that occurred in the gill tissue and kidneys of African catfish immersed in a solution of bay leaf. The metho…