Sasikumar, S. and Leon, J.P.S. 2022. Effect of Copper Sulfate On Hematological and Histological Parameters of Freshwater Fish Oreochromis niloticus at Various Sublethal Concentration : Life Sciences-Aquatic Toxicology. International Journal of Life Science and Pharma Research. 12, 6 (Sep. 2022), L72-L80. DOI:https://doi.org/10.22376/ijpbs/lpr.2022.12.6.L72-80.