To determine the predictive bioaccumulation levels of C. macrocephalus, two assessment methods were employed; namely the computation of the Biota-Sediment Accumulation Factor (BSAF) and through regression method. The BSAF is an expression of the relationship between sediment and tissue. It was computed to determine the degree of accumulation of Cu, Pb and Zn of the organism in comparison to the sediment through the equation