With over 580 farmed species (FAO, 2016), a large variety of different production systems exists both onshore and offshore varying largely between industrialized operators and smallholder producers. The production value of aquatic stock depends on the species and production system in terms of areal and volumetric density of stock, water loading (closed systems), exchange rate of water, hydraulic detention time and cumulative oxygen consumption (Colt, 1991). Therefore, the same aquatic species can generate different yields in function of the production environment. Farming aquatic species is