Roe refers to the eggs of fish, particularly those from species like salmon, trout, and sturgeon. These eggs are often harvested for culinary purposes and are considered a delicacy in many cultures. Roe can be found in various forms, including caviar, which is specifically the salted eggs from sturgeon. Roe is rich in nutrients, including omega-3 fatty acids, proteins, and vitamins. It is commonly used in dishes such as sushi, where fish roe is a popular topping. The preparation and serving of roe can vary widely, with some types being enjoyed raw, while others are cooked or processed.