The peninsula is home to forty percent of Newfoundland's population, and is the location of the provincial capital, St. John's. It is connected to the main section of the island by the 5 km/3 mile wide Isthmus of Avalon. The peninsula sticks out into the rich fishing zones near the Grand Banks. Its four major bays–Trinity Bay, Conception Bay, St. Mary's Bay, and Placentia Bay–have long been the center of Newfoundland's fishing industry.