The body of a porpoise and a sign that reads: 'Bycatch: Death by drowning'. Greenpeace brings the body of a harbour porpoise to the International Whaling Commission (IWC) delegates at the Estrel Hotel in Berlin. Delegates were brought face to face with three dead harbour porpoises, representing 300,000 whales, dolphins and porpoises that die by drowning every year from accidental entanglement in nets.