Aquaculture is one of the fastest growing sectors of the country's primary production, taking into account the comparative advantage derived from the available marine wealth. According to the FAO definition, it is: "the cultivation of aquatic organisms in continental or coastal areas which includes interventions in the growth and hatching process in order to improve production and its individual or cooperative ownership Cultivated stock ".
In aquaculture facilities, supplying and rearing is a priority, and then the conservation, development and multiplication of specific fish species, of great nutritional and therefore economic value. It now works complementary, reinforcing or even replacing the role of fishing in many parts of the country, while at the same time it is a springboard for the exploration of marine biodiversity.
In Europe, aquaculture accounts for almost 20% of fish production and directly employs about 85,000 people. The sector consists mainly of small and medium-sized or very small enterprises located in coastal and rural areas. In the last 30 years in Greece the fish farming of Mediterranean species (mainly sea bream and sea bass) have emerged. Aquaculture of inland waters, ie rivers and lakes, has developed mainly in Epirus and Western Macedonia. Traditional extensive aquaculture in lagoons is another important activity with particular economic and social dimensions.