Cod loins are the thick, meaty sections of the cod fish, typically taken from the upper part of the fish. They are known for their mild flavor and flaky texture, making them a popular choice for various cooking methods, including grilling, baking, and frying. These loins are often sold fresh or frozen and can be found in many grocery stores and fish markets. Cod is a versatile fish that pairs well with a variety of seasonings and sides, making it a favorite among home cooks and chefs alike.