Major cruise lines like Carnival Cruises, MSC Cruises and Disney Cruise Lines are leasing private islands or beaches in the Bahamas, keeping spending within their own ecosystems. But as money flows to these Caribbean islands, some question whether it benefits host nations or diverts business from local ports. WSJ explores the growing trend of private islands and destinations—owned and operated by cruise lines themselves. Chapters: 0:00 Cruise line islands 0:43 Why cruise lines want this 2:19