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Dall's Porpoise (Phocoenoides dalli) is a species of porpoise that came to worldwide attention in the 1970s. It was disclosed for the first time to the public that salmon fishing trawls were killing thousands of Dall's Porpoise and other cetaceans each year by accidentally capturing them in their nets.

Two consistent and well-defined colour morphs— the dalli-type morph and the truei-type morph have been identified. The dalli-type is more widespread, ranging across the north Pacific Ocean from southern California to southern Japan.

Many Dall's Porpoises are killed each year as bycatch in fishing nets. A serious cause of concern is the hunting of Dall's Porpoises by harpoon by Japanese hunters. The number of porpoise killed each year rose dramatically following the moratorium on hunting larger cetaceans introduced in the mid-1980s. 1988 saw the greatest number, more than 40,000, killed. International attention to the hunt through a 1990 International Whaling Commission (IWC) resolution resulted in a reduction in numbers killed, however around 15,000 animals are still killed each year making it the largest direct hunt of any cetacean species in the world. The hunt has been repeatedly criticised by the IWC and its Scientific Committee, most recently in 2008. A quota of just over 16,000 individuals per year is now in operation, which is clearly unsustainable. In addition, unknown numbers of animals are struck-and-lost or caught as bycatch.

They feed on a variety of fish and cephalopods. Shoals of fish such as herring, anchovies and mackerel are common meals.

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