Those waters, southwest of Seoul, are some of South Korea’s most productive ones for producing shellfish, so this could seriously harm the livelihoods of a lot of people. A crane-carrying vessel collided with an oil tanker off of South Korea’s west coast on Friday, spilling more than 66,000 barrels of crude oil in what was believed to be South Korea’s largest offshore oil leak, officials said. Officials at the Maritime and Fisheries Ministry, citing Coast Guard reports, initially said about...