 A ferry company Casco Bay Lines, operated by the Casco Bay Islands Transit District, currently operates ferry services from the Port of Portland to several outlying islands.From 1970 to 2008 the Port of Portland was connected by a seasonal (summer only) international ferry service to Yarmouth, Nova Scotia.Lion Ferry operated the first vessels on this route, MS "Prince of Fundy" (1970–76), MS "Bolero" (1973–76), and MS "Caribe" (1976–81).