The colour of 184 humpback whales (Megaptera nodosa), was studied at the Coal Harbour whaling station on Vancouver Island during the summers of 1949, 1950 and 1951. The colour of the throat region, the flippers and the flukes were classified separately, according to the amount of white present in each of these three regions. Humpback whales from the coast of British Columbia differ from those taken at South Georgia, South Africa, New Zealand and Madagascar in being darker in colour. Males are lighter in colour than females, on the average. No definite change in colour occurs with increase in length.