By Howard Martenstyn For centuries, Sri Lanka’s whales, dolphins and dugongs were a secret known only to fisherfolk and other residents of the island’s coastal districts, as well as a small number of foreign mariners, whalers and naturalists. Today, whale watching has grown to be an ultimate wildlife experience and is one of the fastest growing tourist activities. The country first became the focus of international cetalogical attention in the early 1980s, after research vess