The Brown Crab (Cancer pagurus) is a species of crab commonly found in the waters of the North Atlantic. It has a robust, brownish shell and can grow up to 10 inches across. Brown crabs are known for their large claws, which they use to catch prey such as mollusks and small fish. They are an important species in commercial fishing, particularly in regions like the United Kingdom and France. Brown crabs typically inhabit rocky and sandy seabeds, often found at depths of up to 200 meters. They are most active at night, foraging for food. The species has a life span of around 20 years and plays a crucial role in the marine ecosystem by helping to maintain the balance of species in their habitat.