|The cadmium (Cd) toxicological effects on the fertilized eggs, embryos and larvae were investigated in olive flounder, Paralichthys olivaceus water-borne exposed to Cd. The survival rate and hatching success of the embryos significantly diminished in treated groups in dependence of the Cd concentration. Significant differences were found at ≥ 30 ?g L-1 exposed groups compared to the control group. A significant increase of malformation of the embryo was observed at ≥ 20 ?g L-1 exposed groups. They usually include such symptoms as clouded yolk-sac abnormality, fin erosion and spinal curvature. A significant reduction in the survival rate of the larvae was observed in ≥ 20 ?g L-1 exposed groups with accompanied by the disorder. Notably, in larvae, a concentration as low as 10 ?g L-1 exposed groups caused significant elevated abnormalities that is incidences of spinal cord deformation, abnormal eyes, deformation of the head region and severe developmental delay.