In this study, of individuals the striped venus (Chamelea gallina) and the wedge clam (Donax trunculus) sampled from the natural stock in west of the Marmara Sea were estimated proper-ties growth. Samples were collected for a period of 24 consecutive months in zones off com-mercial fishing by dredging. The distribution length of individuals in populations C. gallina and D. trunculus were 7-39 mm and 11.5-42 between, weight 0.3-21.05 g and 0.26 -17.22 g between, respectively. Both species showed negative allometric growth. The average meat yi-eld of C. gallina and D. trunculus were about .10 and .45, respectively.