There is sufficient evidence that oceanic upwelling system is operative off the Karachi coast and this system being the major mode of phosphate deposition makes this part of ocean richest in nutrient. Sampling of the sea floor sediments was carried out along 20 to 30 fathom bathymetric contour for a distance of 20 miles southwest of Karachi. Analysis of the samples show P2O5 values of 0.56 to 1.18 which is considered to be slightly phosphatic. An apparent reason why phosphate is not being deposited in the area is the close proximity to the mouth of the Indus River which brings an enormous influx of the sediments, Sampling of Recent sediments at the desired depth of 60 to 80 fathoms in the area further southwest of Karachi is thought to provide meaningful results.