This research was held in the coastal waters of Dumai and North Rupat, Province of Riau in November 2015. The aim of this research is to determine the distribution and the mean of Pb and Cu concentrations in Mudskipper’s muscles, gills and bones; to find out the comparison of Pb and Cu concentrations in the Mudskipper in two different stations and also to know the relation of Pb and Cu concen…