“…However, these are benthopelagic fish in coastal and oceanic waters and therefore require strictly controlled conditions to be farmed under indoor conditions (Ottolenghi, Silvestri, Giordano, Lovatelli, & New, 2004). In this regard, water quality is one of the most important requirements to take care of, because the accumulation of nitrogenous, sulphurous and phosphorous compounds can affect not only directly but also indirectly the physiological performance of fish and its predisposition to infections (Lim & Webster, 2001). Furthermore, stressful conditions such as stocking density can trigger the oxygen consumption, ammonia excretion, mucus production, feed conversion ratio decrease and other responses causing the deterioration of water quality conditions.…”