20/11/2002 Spain-St.Marigna-fishing has stop in The northwestern coastline of Galicia a wide variety of fresh shellfish, from scallops and mussels to more exotic delicacies such as goose barnacles and spider crab. .A oil tanker carrying more than 20 million gallons of oil broke in two off the northwest coast of Spain on Tuesday, salvagers said, threatening an environmental disaster. .The Bahamas-flagged Prestige appeared set to sink about 150 miles off Spain's Atlantic coast. If the ship loses its entire cargo, PHOTO:ALFRED.