The study aimed to study the economic feasibility of marine fish farming projects and identify the problems facing the development of this sector and then reach results that benefit policy makers, planners and investors. A questionnaire was designed to study a sample of 40 farms in the Triangle area of Damietta governorate and the field study of fish cages in Wadi El Rayan, 50 cage, and fish cage in Greece and 20 fish cage during the production season 2015-2016. Research Methodology: The study relied on the method of quantitative analysis of data using cost and return analysis, using SPSS program, statistical methods including averages, percentages and income list. The most important results obtained were: The average productivity of the fish cage in Egypt was 5 tons of seabass. In Greece, the production of the cage was 180 tons of seabass and seabream. The total cage cost in Egypt was about 286 thousand pounds. The total income of the cage in Greece was about 984 thousand euros, the net profit in Egypt 114 thousand pounds, while the net profit in Greece amounted to 378 thousand euros Thus, it is clear from this study that aquaculture projects can generate profit and return Economically in Egypt and Greece.