Sharks and tourists just won a new favorite vacation spot. The Maldives today declared its 35,000 square miles of Indian Ocean waters to be a shark sanctuary – a move that may send a message to an international meeting next week where countries will consider worldwide trade restrictions for some shark species. In the Maldives – a top eco-tourist destination – fishing for the predators is now banned and so is the import and export of shark fins – a worldwide trade that kills up to 73 million sharks annually. Fins are sliced off sharks and used mostly as a soup ingredient. The sanctuary,...