Alterations Induced in Gills of Xiphophorus maculates in Response to Petroleum Toxicity

To assess the biological effect of the several pollutants that are constantly released to the water, bio-monitoring is a promising approach that may provide early-warning signals of pollutants exposure. Fish gill is the first target of pollutants action, thus histopathological changes may constitute. The histopathological changes in gills of Xiphophorus maculates showed pathological changes as filament epithelium lifting, necrosis, sinusoidal fibrosis and fusions. This make Xiphophorus maculates a good biomonitor for petroleum pollution.