Companies using aquaculture as their core business activity have to combine many special skills to achieve success. Aquaculture is a farming activity that requires its operators to be adept at understanding diverse subjects, including husbandry, biology, engineering, diseases, which are often grouped within the phrase “stock management”. Environmental management and having the capacity to integrate the aquaculture production activity into the modern concepts of this topic is an absolute obligation for the future. To these areas, one must add the need for skills in sales and marketing, topics that include the requirement of knowledge of food safety legislation and, increasingly, Quality schemes. Finally, the question that each company has to ask itself concerns the profitability of its actions. The business environment is changing rapidly and it is not necessarily clear to individual companies which issues and actions will affect profitability in a positive or a detrimental manner.