During the First World War it was found that the oil extracted from whales proved useful in the production of explosives - and twenty years later, whales were still useful in the efforts to wage the Second World War.
As a result of the rationing of beef some folks along the home front turned to whale meat as a substitute for beef and pork:
"If you walk into a Seattle, Washington butcher shop and ask for a steak, you might be offered a whale steak. No ration points will be required, and the flavor will be somewhere between that of veal and beef. You can prepare your steak just as you would a sirloin, or you can have it ground into whaleburger."
"An average whale is valued at about $5,000, weighs from 50 to 80 tons and gives 7 to 15 tons of edible meat. It produces between 50 to 70 barrels of oil and 5 to 10 tons of bone. The liver weighs from 1,800 pounds and the heart about 400 pounds. Three types of whales are common off of the West Coast: the fin-back, best meat producer; the sperm, good for oil only; and the humpback which provides both meat and oil."
More on W.W. II meat rationing can be read here...
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