Farmed fishes, such as sea bass and sea bream, face conditions and procedures that may adversely affect their health. Researches in this field focus on the stress response to controlled exposure to these factors and evaluate the fish growth performance in a scenario of prolonged exposure to stress. The fishes’ health is assessed at different stages of development (larva, juvenile, adult) through the monitoring of physiological and morphological parameters On the whole, these information increase the knowledge on the physiology of these species and allow to set optimal breeding protocols.