Fish flesh (muscle) sample collection process at Libga and Builpela reservoirs. OLS1=Oreochromis Libga Sample 1, OLS2 = Oreochromis Libga Sample 2, and OLS3 = Oreochromis Libga Sample 3. CLS1 = Clarias Libga Sample 1, CLS2 = Clarias Libga Sample 2, and CLS3 = Clarias Libga Sample 3. OBS1 = Oreochromis Builpela Sample 1, OBS2 = Oreochromis Builpela Sample 2, and OBS3 = Oreochromis Builpela Sample 3. CBS1 = Clarias Builpela Sample 1, CBS2 = Clarias Builpela Sample 2, and CBS3 = Clarias Builpela Sample 3.