To cite this article: Bibi, S., Naz, S., Saeed, S. and Chatha, A.M.M., 2021. A review on histopathological alterations induced by heavy metals (Cd, Ni, Cr, Hg) in different fish species. Punjab Univ. J. Zool., 36(1): 81-89. https://dx.doi.org/10.17582/journal.pujz/2021.36.1.81.89