Site Prameter Pb Cd Fe Cu Zn Weight Length Site: 1 Gill 0.055±0.02a 0.00026±0.01a 0.066±0.2 0.044±0.03 0.047 110.5±0.032 14.3±0.02 Site: 2 Gill 0.096±0.03b 0.065±0.02 0.084 0.12±0.03 0.15±0.022 101.2± 0.03 15.8±0.02 Site: 3 Gill 0.38±0.024a 0.0025±0.03a 0.23±.0.025 0.074±0.025 0.10±0.021 0.033±0.02 14.2±0.03

Site 1: AL-atwey Damietta, Site 2: AL-Gmalia Dakahlyi and Site 3: Materyia Dakahlia. Table 3: Concentration of heavy metal in ug/kg in Tilapia niloticus fish ( tissue and gill) , Weight in gm and Length in cm in the studied group.