Maryland has the highest median household income, making it the wealthiest state in the nation. Maryland typically is referred to by three nicknames: the Old Line State, the Free State, and the Chesapeake Bay State. Maryland has a large food-production sector. A large component of this is commercial fishing, centered in the Chesapeake Bay, but also including activity off the short Atlantic seacoast. The largest catches by species are the blue crab, oysters, striped bass, and menhaden.