Mussels are a simple and affordable food. No wonder they are called "oysters for the poor." The rocks of Cornwall in England are almost covered with black mussels. They are collected there and transferred to rivers for advanced cultivation.
The season for gathering molluscs in England falls in winter and early spring. At this time of the year, many restaurants prepare a very popular dish—the classic "moulles frites" consisting of mussels and chips.