In the past sixty years, demand for seafood products for human consumption has increased sixfold. With increasing wealth, increased attention for healthy diets and increasing concerns for environmental issues, it is expected that people will shift away from the consumption of terrestrial animals and move towards pescatarian, vegetarian and vegan dietary patterns. As a result, it is expected that the demand for aquatic animals will keep increasing in the upcoming decade. This thesis project examines the dietary motivations and sustainability concerns of pescatarians, a specific group of individuals who exclude the consumption of meat from terrestrial animals and while still consuming aquatic animals. The study aims to gain insights into the factors driving dietary choices and explore the relationship between these choices and sustainability considerations. Furthermore, by investigating the consumption choices made by pescatarians, the research sheds light on the broader implications for sustainable food systems.