The corbiculid clams have a wide range of distribution throughout most of the world freshwater ecosystems including the Egyptian irrigation system. They displayed great variability in shell morphology that reflects the above wide range of habitats. Accordingly, they are systematically difficult group. The shell morphometry of three populations of Corbicula fluminea (Muller, 1774) from different areas at River Nile canal system, were studied in order to provide a base for its taxonomy. The length-total body and shell weights relationships were different for the three populations. However, all investigated habitats were suitable for the clam survival as indicated by the values of the relative coefficient of condition (Kn) that was about 1.0. The growth parameters of von Bertalanffy growth formula (L, K and t0) were computed for pooled samples of C. fluminea using Chapman method. The estimated life span of this clam extended to about 13 months and included two recruits, one appeared in July and the other in November.