BLVEFIELDS, the principal Caribbean port of Nicaragua, Central America. Pop. 4, 706. It is located near the mouth of the Bluefields river, and is visited by steamers from New Orleans and coasting schooners, while a river steamer plies the Bluefields river and considerable trade is carried on with the interior, where bananas, lumber, cattle and gold are produced. The actual port is El Bluff, across the bay, where the customs are in charge of an American employee of the Nicaraguan government. Bluefields has been the scene of several revolutionary outbreaks, the cus tom in recent years having been for U.S. marines to land and establish a "neutral zone" around the centre of the town, where the banks and houses of the foreign residents are situated.