The carpet shell clam, Ruditapes decussatus is one of the most popular and commercially important
mollusks in Egypt. This study aimed to investigate the effect of density (50, 150 and 200 ind/m2) and
temperature (21 and 24 ºC) on growth performances and survival rates of Ruditapes decussatus seeds using two
different techniques (racking cage and closed system). The growth performances were determined by
measurement of all biometric measurements comprised shell length, height, width, total weight, soft body weight
and dry weight before, through and at the end of the experiments. The best growth was recorded in density 150
ind/m2 in the racking cage. Concerning temperature experiment, the highest growth performances were
recorded at 21±1ºC compared with other higher temperature