ON July 16, 1960, in a salmon bagnet at Altens fishing station on the sea-coast near Aberdeen, a fish was caught which was recognized as unusual. It was sent to the Freshwater Fisheries Laboratory at Pitlochry and then to the British Museum (Natural History), where it was identified as Oncorhynchus gorbuscha (Walbaum)1,2, the pink or humpback salmon, a species the natural distribution of which is along the Pacific coasts of North America and Asia from the Bering Straits to Peter the Great Bay and the Sacramento River.