Seed spat production of bivalve mollusks, specifically the size 1.0 to 10.0 mm, represents a limitation for aquaculture production. These stages usually develop in the ocean or continuous water-flux systems, leaving the organisms exposed to environmental conditions which cause irregular production throughout time. Recirculation systems might be a practical option and economically viable to culture larvae, post-larvae, and juveniles of bivalve mollusks. The objective of this work was to culture clam seed of the genus Chione cortezi at two different temperatures (24 and 28 °C) and three different stocking densities (11,000, 16,000 and 21,000 organisms by 2.3 liters experimental unit) in recirculation aquaculture systems (RAS). After 28 days of carrying out experiments, it was observed that the water quality in the systems (DO, pH, TAN, NO2, NO3, alkalinity, CO2, CO3-2, HCO3- and salinity) remained in values and concentrations reasonably adequate for the growing of clam seeds. Moreover, the organisms cultured at 24°C and density of 21,000 organisms by 2.3 liters per experimental unit, were the ones that showed the best specific growth rates regarding size and weight. Despite that, a high survival of the organisms maintained at 28°C was observed. The use of microalgae concentrates resulted in a practical option and economically viable for the feeding of Chione cortezi juveniles cultured in RAS. It is important to consider that this research is a pioneer in the study of the growth and survival of C. cortezi juveniles so future studies should be carried out to allow contrast in different culture scenarios that could better its production. It is also essential to evaluate the degree of tolerance of this species at different concentrations of CO2.