Periwinkles are small marine snails with spiral-shaped shells in shades of dark gray and brown. They live along the rocky coasts of the North Atlantic Ocean and the North Sea, especially in European countries such as Ireland, Great Britain, France, Spain, and the Netherlands. These snails thrive in tidal areas where they feed on algae and organic material, and their presence indicates a healthy marine environment.

Periwinkles are typically harvested by hand during low tide to minimize environmental disturbance and preserve their quality. Sometimes nets or rakes are used. This harvesting method is a traditional craft that places high importance on sustainability.

In the kitchen, periwinkles are considered a delicacy and can be steamed, boiled, or fried. They have a light, briny flavor and a firm texture, and are often served with herb butter or vinaigrette. They are rich in proteins, omega-3 fatty acids, vitamins, and minerals, and have a low fat and calorie content, making them a healthy addition to a balanced diet.

Fresh periwinkles are usually sold in nets or baskets and should be purchased alive and fresh. They can be kept in the refrigerator for a few days or longer if frozen after cooking, allowing you to always enjoy their taste and nutritional benefits.