Micronucleus Assay: Fish erythrocytes are especially
favored for micronucleus test [47] and its feasibility has
already been established in Clarias gariepinus [48]. It was
stated by many authors that abnormal nuclear
morphology is an indicator of genotoxic damage in fish
[18, 49]. Alternatively, various abnormal morphological
forms of erythrocytes are effective indicators of
cytotoxicity