This study aimed to evaluate the economic feasibility and economic efficiency of the production of sea bass and sea bream in different marine aquaculture systems in the valley Mariout. In order to achieve this goal, a questionnaire has been prepared for collecting data during the period from May 2015 until October 2015 from a random sample of sea bass and sea bream farms in Valley Mariout in Alexandria for the 2014/2015 production season. Data have been analyzed through the descriptive method of statistical analysis, and through cost-benefit analysis. The study concluded that the farming of sea bass and sea bream fish farming in ponds that depend on natural nutrition is the most economically feasible, then followed by the farming in cages basins, the cages in the valley, ponds that rely on industrial food and pens culture.