Abstract.- Cadmium (Cd) is one of the most harmful heavy metal pollutants in aquatic environments.
Fingerlings of Nile tilapia, Oreochromis niloticus, were exposed to sublethal concentrations (10, 20 and 30% of the
96-h LC50) CdCl2 which caused significant changes in concentration dependent manner in the hepatic and ileal tissues.
The hepatic tissue lost its characteristic architecture, with increased vacoulations in hepatocytes. In addition, abundant
eythrocytic infiltration was observed in the 10% of LC50 group and clearly increased in the 20% of LC50 group.