There is growing interest in animal welfare from both the public and the scientific community. This is a complex concept with no formal consensus regarding definitions and methods to approach it, which becomes even more complicated in fish due to their vast diversity; what holds true for one species may not apply to another. Furthermore, fish farming is a much more recent activity compared with that of terrestrial animals. Studies on welfare aim to determine what is harmful or undesirable for the animal and try to mitigate negative impacts on their well-being. Extensive research has been conducted on behavioral, physiological, growth, and health indicators of welfare impairment. However, welfare also concerns what is beneficial or desired by the animal, which relates to positive welfare. Research on positive welfare in fish is lagging. Animal personality refers to behavioral tendencies that affect behavior in different contexts, vary across individuals in a given population, and are consistent within individuals across time. The purpose of this talk is to examine how the field of personality can be implemen ted in the welfare framework of farmed fish.