At that moment, in June 1975, only a fraction of the former population of great whales remained in the world’s oceans, and the Soviet catcher boat was hunting down some of the last of them. Even worse, Hunter and others had only glimpsed the tip of the iceberg. Unbeknownst to the world, the Soviets had been killing tens of thousands more whales than they were reporting to the International Whaling Commission—an illegal and dishonest catch that one writer termed the “most senseless environmental crime of the 20th century.” It was probably also the most sudden revolution the globe’s oceans have ever experienced.